diff --git a/docs/release-notes/release-notes-0.15.1.md b/docs/release-notes/release-notes-0.15.1.md
index 3a85bac5b..48369482d 100644
--- a/docs/release-notes/release-notes-0.15.1.md
+++ b/docs/release-notes/release-notes-0.15.1.md
@@ -57,6 +57,9 @@
   responses. In addition to that, errors returned from `lnd` can now also be
   intercepted and changed by the middleware.
 
+* The `signrpc.SignMessage` and `signrpc.VerifyMessage` now supports [Schnorr
+  signatures](https://github.com/lightningnetwork/lnd/pull/6722).
+
 ## Bug Fixes
 
 * Fixed data race found in
diff --git a/keychain/btcwallet.go b/keychain/btcwallet.go
index 3e041bc2e..c14c198c3 100644
--- a/keychain/btcwallet.go
+++ b/keychain/btcwallet.go
@@ -6,7 +6,9 @@ import (
 
 	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/btcsuite/btcd/btcec/v2/ecdsa"
+	"github.com/btcsuite/btcd/btcec/v2/schnorr"
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
+	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcwallet/waddrmgr"
 	"github.com/btcsuite/btcwallet/wallet"
 	"github.com/btcsuite/btcwallet/walletdb"
@@ -452,3 +454,33 @@ func (b *BtcWalletKeyRing) SignMessageCompact(keyLoc KeyLocator,
 	}
 	return ecdsa.SignCompact(privKey, digest, true)
 }
+
+// SignMessageSchnorr uses the Schnorr signature algorithm to sign the given
+// message, single or double SHA256 hashing it first, with the private key
+// described in the key locator and the optional tweak applied to the private
+// key.
+//
+// NOTE: This is part of the keychain.MessageSignerRing interface.
+func (b *BtcWalletKeyRing) SignMessageSchnorr(keyLoc KeyLocator,
+	msg []byte, doubleHash bool, taprootTweak []byte) (*schnorr.Signature,
+	error) {
+
+	privKey, err := b.DerivePrivKey(KeyDescriptor{
+		KeyLocator: keyLoc,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	if len(taprootTweak) > 0 {
+		privKey = txscript.TweakTaprootPrivKey(privKey, taprootTweak)
+	}
+
+	var digest []byte
+	if doubleHash {
+		digest = chainhash.DoubleHashB(msg)
+	} else {
+		digest = chainhash.HashB(msg)
+	}
+	return schnorr.Sign(privKey, digest)
+}
diff --git a/keychain/derivation.go b/keychain/derivation.go
index 0e42ae966..539f3dbc9 100644
--- a/keychain/derivation.go
+++ b/keychain/derivation.go
@@ -5,6 +5,7 @@ import (
 
 	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/btcsuite/btcd/btcec/v2/ecdsa"
+	"github.com/btcsuite/btcd/btcec/v2/schnorr"
 )
 
 const (
@@ -234,6 +235,13 @@ type MessageSignerRing interface {
 	// format.
 	SignMessageCompact(keyLoc KeyLocator, msg []byte,
 		doubleHash bool) ([]byte, error)
+
+	// SignMessageSchnorr signs the given message, single or double SHA256
+	// hashing it first, with the private key described in the key locator
+	// and the optional Taproot tweak applied to the private key.
+	SignMessageSchnorr(keyLoc KeyLocator, msg []byte,
+		doubleHash bool, taprootTweak []byte) (*schnorr.Signature,
+		error)
 }
 
 // SingleKeyMessageSigner is an abstraction interface that hides the
diff --git a/lnrpc/signrpc/signer.pb.go b/lnrpc/signrpc/signer.pb.go
index a51c671ad..21bee401e 100644
--- a/lnrpc/signrpc/signer.pb.go
+++ b/lnrpc/signrpc/signer.pb.go
@@ -651,7 +651,9 @@ type SignMessageReq struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// The message to be signed.
+	//
+	//The message to be signed. When using REST, this field must be encoded as
+	//base64.
 	Msg []byte `protobuf:"bytes,1,opt,name=msg,proto3" json:"msg,omitempty"`
 	// The key locator that identifies which key to use for signing.
 	KeyLoc *KeyLocator `protobuf:"bytes,2,opt,name=key_loc,json=keyLoc,proto3" json:"key_loc,omitempty"`
@@ -659,8 +661,16 @@ type SignMessageReq struct {
 	DoubleHash bool `protobuf:"varint,3,opt,name=double_hash,json=doubleHash,proto3" json:"double_hash,omitempty"`
 	//
 	//Use the compact (pubkey recoverable) format instead of the raw lnwire
-	//format.
+	//format. This option cannot be used with Schnorr signatures.
 	CompactSig bool `protobuf:"varint,4,opt,name=compact_sig,json=compactSig,proto3" json:"compact_sig,omitempty"`
+	//
+	//Use Schnorr signature. This option cannot be used with compact format.
+	SchnorrSig bool `protobuf:"varint,5,opt,name=schnorr_sig,json=schnorrSig,proto3" json:"schnorr_sig,omitempty"`
+	//
+	//The optional Taproot tweak bytes to apply to the private key before creating
+	//a Schnorr signature. The private key is tweaked as described in BIP-341:
+	//privKey + h_tapTweak(internalKey || tapTweak)
+	SchnorrSigTapTweak []byte `protobuf:"bytes,6,opt,name=schnorr_sig_tap_tweak,json=schnorrSigTapTweak,proto3" json:"schnorr_sig_tap_tweak,omitempty"`
 }
 
 func (x *SignMessageReq) Reset() {
@@ -723,6 +733,20 @@ func (x *SignMessageReq) GetCompactSig() bool {
 	return false
 }
 
+func (x *SignMessageReq) GetSchnorrSig() bool {
+	if x != nil {
+		return x.SchnorrSig
+	}
+	return false
+}
+
+func (x *SignMessageReq) GetSchnorrSigTapTweak() []byte {
+	if x != nil {
+		return x.SchnorrSigTapTweak
+	}
+	return nil
+}
+
 type SignMessageResp struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -777,14 +801,22 @@ type VerifyMessageReq struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// The message over which the signature is to be verified.
+	// The message over which the signature is to be verified. When using
+	// REST, this field must be encoded as base64.
 	Msg []byte `protobuf:"bytes,1,opt,name=msg,proto3" json:"msg,omitempty"`
 	//
 	//The fixed-size LN wire encoded signature to be verified over the given
-	//message.
+	//message. When using REST, this field must be encoded as base64.
 	Signature []byte `protobuf:"bytes,2,opt,name=signature,proto3" json:"signature,omitempty"`
-	// The public key the signature has to be valid for.
+	//
+	//The public key the signature has to be valid for. When using REST, this
+	//field must be encoded as base64. If the is_schnorr_sig option is true, then
+	//the public key is expected to be in the 32-byte x-only serialization
+	//according to BIP-340.
 	Pubkey []byte `protobuf:"bytes,3,opt,name=pubkey,proto3" json:"pubkey,omitempty"`
+	//
+	//Specifies if the signature is a Schnorr signature.
+	IsSchnorrSig bool `protobuf:"varint,4,opt,name=is_schnorr_sig,json=isSchnorrSig,proto3" json:"is_schnorr_sig,omitempty"`
 }
 
 func (x *VerifyMessageReq) Reset() {
@@ -840,6 +872,13 @@ func (x *VerifyMessageReq) GetPubkey() []byte {
 	return nil
 }
 
+func (x *VerifyMessageReq) GetIsSchnorrSig() bool {
+	if x != nil {
+		return x.IsSchnorrSig
+	}
+	return false
+}
+
 type VerifyMessageResp struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1973,7 +2012,7 @@ var file_signrpc_signer_proto_rawDesc = []byte{
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@@ -1982,204 +2021,212 @@ var file_signrpc_signer_proto_rawDesc = []byte{
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+	0x69, 0x6e, 0x67, 0x6e, 0x65, 0x74, 0x77, 0x6f, 0x72, 0x6b, 0x2f, 0x6c, 0x6e, 0x64, 0x2f, 0x6c,
+	0x6e, 0x72, 0x70, 0x63, 0x2f, 0x73, 0x69, 0x67, 0x6e, 0x72, 0x70, 0x63, 0x62, 0x06, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/lnrpc/signrpc/signer.proto b/lnrpc/signrpc/signer.proto
index 07e2db3b1..5ea85dd70 100644
--- a/lnrpc/signrpc/signer.proto
+++ b/lnrpc/signrpc/signer.proto
@@ -320,7 +320,10 @@ message InputScriptResp {
 }
 
 message SignMessageReq {
-    // The message to be signed.
+    /*
+    The message to be signed. When using REST, this field must be encoded as
+    base64.
+    */
     bytes msg = 1;
 
     // The key locator that identifies which key to use for signing.
@@ -331,9 +334,21 @@ message SignMessageReq {
 
     /*
     Use the compact (pubkey recoverable) format instead of the raw lnwire
-    format.
+    format. This option cannot be used with Schnorr signatures.
     */
     bool compact_sig = 4;
+
+    /*
+    Use Schnorr signature. This option cannot be used with compact format.
+    */
+    bool schnorr_sig = 5;
+
+    /*
+    The optional Taproot tweak bytes to apply to the private key before creating
+    a Schnorr signature. The private key is tweaked as described in BIP-341:
+    privKey + h_tapTweak(internalKey || tapTweak)
+    */
+    bytes schnorr_sig_tap_tweak = 6;
 }
 message SignMessageResp {
     /*
@@ -343,18 +358,30 @@ message SignMessageResp {
 }
 
 message VerifyMessageReq {
-    // The message over which the signature is to be verified.
+    // The message over which the signature is to be verified. When using
+    // REST, this field must be encoded as base64.
     bytes msg = 1;
 
     /*
     The fixed-size LN wire encoded signature to be verified over the given
-    message.
+    message. When using REST, this field must be encoded as base64.
     */
     bytes signature = 2;
 
-    // The public key the signature has to be valid for.
+    /*
+    The public key the signature has to be valid for. When using REST, this
+    field must be encoded as base64. If the is_schnorr_sig option is true, then
+    the public key is expected to be in the 32-byte x-only serialization
+    according to BIP-340.
+    */
     bytes pubkey = 3;
+
+    /*
+    Specifies if the signature is a Schnorr signature.
+    */
+    bool is_schnorr_sig = 4;
 }
+
 message VerifyMessageResp {
     // Whether the signature was valid over the given message.
     bool valid = 1;
diff --git a/lnrpc/signrpc/signer.swagger.json b/lnrpc/signrpc/signer.swagger.json
index 5a7a424a9..5b309b7c3 100644
--- a/lnrpc/signrpc/signer.swagger.json
+++ b/lnrpc/signrpc/signer.swagger.json
@@ -767,7 +767,7 @@
         "msg": {
           "type": "string",
           "format": "byte",
-          "description": "The message to be signed."
+          "description": "The message to be signed. When using REST, this field must be encoded as\nbase64."
         },
         "key_loc": {
           "$ref": "#/definitions/signrpcKeyLocator",
@@ -779,7 +779,16 @@
         },
         "compact_sig": {
           "type": "boolean",
-          "description": "Use the compact (pubkey recoverable) format instead of the raw lnwire\nformat."
+          "description": "Use the compact (pubkey recoverable) format instead of the raw lnwire\nformat. This option cannot be used with Schnorr signatures."
+        },
+        "schnorr_sig": {
+          "type": "boolean",
+          "description": "Use Schnorr signature. This option cannot be used with compact format."
+        },
+        "schnorr_sig_tap_tweak": {
+          "type": "string",
+          "format": "byte",
+          "title": "The optional Taproot tweak bytes to apply to the private key before creating\na Schnorr signature. The private key is tweaked as described in BIP-341:\nprivKey + h_tapTweak(internalKey || tapTweak)"
         }
       }
     },
@@ -890,17 +899,21 @@
         "msg": {
           "type": "string",
           "format": "byte",
-          "description": "The message over which the signature is to be verified."
+          "description": "The message over which the signature is to be verified. When using\nREST, this field must be encoded as base64."
         },
         "signature": {
           "type": "string",
           "format": "byte",
-          "description": "The fixed-size LN wire encoded signature to be verified over the given\nmessage."
+          "description": "The fixed-size LN wire encoded signature to be verified over the given\nmessage. When using REST, this field must be encoded as base64."
         },
         "pubkey": {
           "type": "string",
           "format": "byte",
-          "description": "The public key the signature has to be valid for."
+          "description": "The public key the signature has to be valid for. When using REST, this\nfield must be encoded as base64. If the is_schnorr_sig option is true, then\nthe public key is expected to be in the 32-byte x-only serialization\naccording to BIP-340."
+        },
+        "is_schnorr_sig": {
+          "type": "boolean",
+          "description": "Specifies if the signature is a Schnorr signature."
         }
       }
     },
diff --git a/lnrpc/signrpc/signer_server.go b/lnrpc/signrpc/signer_server.go
index b71d14f4a..7c098f257 100644
--- a/lnrpc/signrpc/signer_server.go
+++ b/lnrpc/signrpc/signer_server.go
@@ -601,6 +601,10 @@ func (s *Server) SignMessage(_ context.Context,
 	if in.KeyLoc == nil {
 		return nil, fmt.Errorf("a key locator MUST be passed in")
 	}
+	if in.SchnorrSig && in.CompactSig {
+		return nil, fmt.Errorf("compact format can not be used for " +
+			"Schnorr signatures")
+	}
 
 	// Describe the private key we'll be using for signing.
 	keyLocator := keychain.KeyLocator{
@@ -608,6 +612,27 @@ func (s *Server) SignMessage(_ context.Context,
 		Index:  uint32(in.KeyLoc.KeyIndex),
 	}
 
+	// Use the schnorr signature algorithm to sign the message.
+	if in.SchnorrSig {
+		sig, err := s.cfg.KeyRing.SignMessageSchnorr(
+			keyLocator, in.Msg, in.DoubleHash,
+			in.SchnorrSigTapTweak,
+		)
+		if err != nil {
+			return nil, fmt.Errorf("can't sign the hash: %v", err)
+		}
+
+		sigParsed, err := schnorr.ParseSignature(sig.Serialize())
+		if err != nil {
+			return nil, fmt.Errorf("can't parse Schnorr "+
+				"signature: %v", err)
+		}
+
+		return &SignMessageResp{
+			Signature: sigParsed.Serialize(),
+		}, nil
+	}
+
 	// To allow a watch-only wallet to forward the SignMessageCompact to an
 	// endpoint that doesn't add the message prefix, we allow this RPC to
 	// also return the compact signature format instead of adding a flag to
@@ -644,7 +669,7 @@ func (s *Server) SignMessage(_ context.Context,
 
 // VerifyMessage verifies a signature over a message using the public key
 // provided. The signature must be fixed-size LN wire format encoded.
-func (s *Server) VerifyMessage(ctx context.Context,
+func (s *Server) VerifyMessage(_ context.Context,
 	in *VerifyMessageReq) (*VerifyMessageResp, error) {
 
 	if in.Msg == nil {
@@ -657,6 +682,31 @@ func (s *Server) VerifyMessage(ctx context.Context,
 	if in.Pubkey == nil {
 		return nil, fmt.Errorf("a pubkey to verify MUST be passed in")
 	}
+
+	// We allow for Schnorr signatures to be verified.
+	if in.IsSchnorrSig {
+		// We expect the public key to be in the BIP-340 32-byte format
+		// for Schnorr signatures.
+		pubkey, err := schnorr.ParsePubKey(in.Pubkey)
+		if err != nil {
+			return nil, fmt.Errorf("unable to parse pubkey: %v",
+				err)
+		}
+
+		sigParsed, err := schnorr.ParseSignature(in.Signature)
+		if err != nil {
+			return nil, fmt.Errorf("can't parse Schnorr "+
+				"signature: %v", err)
+		}
+
+		digest := chainhash.HashB(in.Msg)
+		valid := sigParsed.Verify(digest, pubkey)
+
+		return &VerifyMessageResp{
+			Valid: valid,
+		}, nil
+	}
+
 	pubkey, err := btcec.ParsePubKey(in.Pubkey)
 	if err != nil {
 		return nil, fmt.Errorf("unable to parse pubkey: %v", err)
diff --git a/lntest/itest/lnd_remote_signer_test.go b/lntest/itest/lnd_remote_signer_test.go
index 7a30e5c74..2e66f9c31 100644
--- a/lntest/itest/lnd_remote_signer_test.go
+++ b/lntest/itest/lnd_remote_signer_test.go
@@ -117,6 +117,12 @@ func testRemoteSigner(net *lntest.NetworkHarness, t *harnessTest) {
 		fn: func(tt *harnessTest, wo, carol *lntest.HarnessNode) {
 			runSignOutputRaw(tt, net, wo)
 		},
+	}, {
+		name:      "sign verify msg",
+		sendCoins: true,
+		fn: func(tt *harnessTest, wo, carol *lntest.HarnessNode) {
+			runSignVerifyMessage(tt, net, wo)
+		},
 	}, {
 		name:      "taproot",
 		sendCoins: true,
diff --git a/lntest/itest/lnd_signer_test.go b/lntest/itest/lnd_signer_test.go
index 0d4b78185..ea7d147cd 100644
--- a/lntest/itest/lnd_signer_test.go
+++ b/lntest/itest/lnd_signer_test.go
@@ -3,9 +3,11 @@ package itest
 import (
 	"bytes"
 	"context"
+	"crypto/sha256"
 	"fmt"
 
 	"github.com/btcsuite/btcd/btcec/v2"
+	"github.com/btcsuite/btcd/btcec/v2/schnorr"
 	"github.com/btcsuite/btcd/btcutil"
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcd/wire"
@@ -61,8 +63,12 @@ func runDeriveSharedKey(t *harnessTest, alice *lntest.HarnessNode) {
 
 	customizedKeyFamily := int32(keychain.KeyFamilyMultiSig)
 	customizedIndex := int32(1)
+
 	customizedPub, err := deriveCustomizedKey(
-		ctxb, alice, customizedKeyFamily, customizedIndex,
+		ctxb, alice, &signrpc.KeyLocator{
+			KeyFamily: customizedKeyFamily,
+			KeyIndex:  customizedIndex,
+		},
 	)
 	require.NoError(t.t, err, "failed to create customized pubkey")
 
@@ -394,14 +400,12 @@ func assertSignOutputRaw(t *harnessTest, net *lntest.NetworkHarness,
 // deriveCustomizedKey uses the family and index to derive a public key from
 // the node's walletkit client.
 func deriveCustomizedKey(ctx context.Context, node *lntest.HarnessNode,
-	family, index int32) (*btcec.PublicKey, error) {
+	keyLoc *signrpc.KeyLocator) (*btcec.PublicKey, error) {
 
-	ctxt, _ := context.WithTimeout(ctx, defaultTimeout)
-	req := &signrpc.KeyLocator{
-		KeyFamily: family,
-		KeyIndex:  index,
-	}
-	resp, err := node.WalletKitClient.DeriveKey(ctxt, req)
+	ctxt, cancel := context.WithTimeout(ctx, defaultTimeout)
+	defer cancel()
+
+	resp, err := node.WalletKitClient.DeriveKey(ctxt, keyLoc)
 	if err != nil {
 		return nil, fmt.Errorf("failed to derive key: %v", err)
 	}
@@ -411,3 +415,104 @@ func deriveCustomizedKey(ctx context.Context, node *lntest.HarnessNode,
 	}
 	return pub, nil
 }
+
+// testSignVerifyMessage makes sure that the SignMessage RPC can be used with
+// all custom flags by verifying with VerifyMessage. Tests both ECDSA and
+// Schnorr signatures.
+func testSignVerifyMessage(net *lntest.NetworkHarness, t *harnessTest) {
+	runSignVerifyMessage(t, net, net.Alice)
+}
+
+// runSignVerifyMessage makes sure that the SignMessage RPC can be used with all
+// custom flags by verifying with VerifyMessage. Tests both ECDSA and Schnorr
+// signatures.
+func runSignVerifyMessage(t *harnessTest, net *lntest.NetworkHarness,
+	alice *lntest.HarnessNode) {
+
+	ctxb := context.Background()
+	ctxt, cancel := context.WithTimeout(ctxb, defaultTimeout)
+	defer cancel()
+
+	aliceMsg := []byte("alice msg")
+	keyLoc := &signrpc.KeyLocator{
+		KeyFamily: int32(keychain.KeyFamilyNodeKey),
+		KeyIndex:  1,
+	}
+
+	// Sign a message with the default ECDSA.
+	signMsgReq := &signrpc.SignMessageReq{
+		Msg:        aliceMsg,
+		KeyLoc:     keyLoc,
+		SchnorrSig: false,
+	}
+
+	signMsgResp, err := alice.SignerClient.SignMessage(ctxt, signMsgReq)
+	require.NoError(t.t, err, "failed to sign message")
+
+	customPubKey, err := deriveCustomizedKey(ctxt, alice, keyLoc)
+	require.NoError(t.t, err, "failed to create customized pubkey")
+
+	verifyReq := &signrpc.VerifyMessageReq{
+		Msg:          aliceMsg,
+		Signature:    signMsgResp.Signature,
+		Pubkey:       customPubKey.SerializeCompressed(),
+		IsSchnorrSig: false,
+	}
+	verifyResp, err := alice.SignerClient.VerifyMessage(ctxt, verifyReq)
+	require.NoError(t.t, err)
+
+	require.True(t.t, verifyResp.Valid, "failed to verify message")
+
+	// Use a different key locator.
+	keyLoc = &signrpc.KeyLocator{
+		KeyFamily: int32(keychain.KeyFamilyNodeKey),
+		KeyIndex:  2,
+	}
+
+	// Sign a message with Schnorr signature.
+	signMsgReq = &signrpc.SignMessageReq{
+		Msg:        aliceMsg,
+		KeyLoc:     keyLoc,
+		SchnorrSig: true,
+	}
+
+	signMsgResp, err = alice.SignerClient.SignMessage(ctxt, signMsgReq)
+	require.NoError(t.t, err)
+
+	customPubKey, err = deriveCustomizedKey(ctxt, alice, keyLoc)
+	require.NoError(t.t, err, "failed to create customized pubkey")
+
+	// Verify the Schnorr signature.
+	verifyReq = &signrpc.VerifyMessageReq{
+		Msg:          aliceMsg,
+		Signature:    signMsgResp.Signature,
+		Pubkey:       schnorr.SerializePubKey(customPubKey),
+		IsSchnorrSig: true,
+	}
+	verifyResp, err = alice.SignerClient.VerifyMessage(ctxt, verifyReq)
+	require.NoError(t.t, err)
+
+	require.True(t.t, verifyResp.Valid, "failed to verify message")
+
+	// Also test that we can tweak a private key and verify the message
+	// against the tweaked public key.
+	tweakBytes := sha256.Sum256([]byte("some text"))
+	tweakedPubKey := txscript.ComputeTaprootOutputKey(
+		customPubKey, tweakBytes[:],
+	)
+
+	signMsgReq.SchnorrSigTapTweak = tweakBytes[:]
+	signMsgResp, err = alice.SignerClient.SignMessage(ctxt, signMsgReq)
+	require.NoError(t.t, err)
+
+	verifyReq = &signrpc.VerifyMessageReq{
+		Msg:          aliceMsg,
+		Signature:    signMsgResp.Signature,
+		Pubkey:       schnorr.SerializePubKey(tweakedPubKey),
+		IsSchnorrSig: true,
+	}
+	verifyResp, err = alice.SignerClient.VerifyMessage(ctxt, verifyReq)
+	require.NoError(t.t, err)
+
+	require.True(t.t, verifyResp.Valid, "failed to verify message")
+}
diff --git a/lntest/itest/lnd_test_list_on_test.go b/lntest/itest/lnd_test_list_on_test.go
index 5585ae472..81202d844 100644
--- a/lntest/itest/lnd_test_list_on_test.go
+++ b/lntest/itest/lnd_test_list_on_test.go
@@ -169,6 +169,10 @@ var allTestCases = []*testCase{
 		name: "sign output raw",
 		test: testSignOutputRaw,
 	},
+	{
+		name: "sign verify message",
+		test: testSignVerifyMessage,
+	},
 	{
 		name: "async payments benchmark",
 		test: testAsyncPayments,
diff --git a/lntest/mock/secretkeyring.go b/lntest/mock/secretkeyring.go
index 94fa13381..f7e590edd 100644
--- a/lntest/mock/secretkeyring.go
+++ b/lntest/mock/secretkeyring.go
@@ -3,7 +3,9 @@ package mock
 import (
 	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/btcsuite/btcd/btcec/v2/ecdsa"
+	"github.com/btcsuite/btcd/btcec/v2/schnorr"
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
+	"github.com/btcsuite/btcd/txscript"
 	"github.com/lightningnetwork/lnd/keychain"
 )
 
@@ -69,3 +71,23 @@ func (s *SecretKeyRing) SignMessageCompact(_ keychain.KeyLocator,
 	}
 	return ecdsa.SignCompact(s.RootKey, digest, true)
 }
+
+// SignMessageSchnorr signs the passed message and ignores the KeyDescriptor.
+func (s *SecretKeyRing) SignMessageSchnorr(_ keychain.KeyLocator,
+	msg []byte, doubleHash bool, taprootTweak []byte) (*schnorr.Signature,
+	error) {
+
+	var digest []byte
+	if doubleHash {
+		digest = chainhash.DoubleHashB(msg)
+	} else {
+		digest = chainhash.HashB(msg)
+	}
+
+	privKey := s.RootKey
+	if len(taprootTweak) > 0 {
+		privKey = txscript.TweakTaprootPrivKey(privKey, taprootTweak)
+	}
+
+	return schnorr.Sign(privKey, digest)
+}
diff --git a/lnwallet/rpcwallet/rpcwallet.go b/lnwallet/rpcwallet/rpcwallet.go
index cb7467752..fbd92d230 100644
--- a/lnwallet/rpcwallet/rpcwallet.go
+++ b/lnwallet/rpcwallet/rpcwallet.go
@@ -488,6 +488,43 @@ func (r *RPCKeyRing) SignMessageCompact(keyLoc keychain.KeyLocator,
 	return resp.Signature, nil
 }
 
+// SignMessageSchnorr attempts to sign a target message with the private key
+// described in the key locator. If the target private key is unable to be
+// found, then an error will be returned. The actual digest signed is the
+// single or double SHA-256 of the passed message.
+//
+// NOTE: This method is part of the keychain.MessageSignerRing interface.
+func (r *RPCKeyRing) SignMessageSchnorr(keyLoc keychain.KeyLocator,
+	msg []byte, doubleHash bool, taprootTweak []byte) (*schnorr.Signature,
+	error) {
+
+	ctxt, cancel := context.WithTimeout(context.Background(), r.rpcTimeout)
+	defer cancel()
+
+	resp, err := r.signerClient.SignMessage(ctxt, &signrpc.SignMessageReq{
+		Msg: msg,
+		KeyLoc: &signrpc.KeyLocator{
+			KeyFamily: int32(keyLoc.Family),
+			KeyIndex:  int32(keyLoc.Index),
+		},
+		DoubleHash:         doubleHash,
+		SchnorrSig:         true,
+		SchnorrSigTapTweak: taprootTweak,
+	})
+	if err != nil {
+		considerShutdown(err)
+		return nil, fmt.Errorf("error signing message in remote "+
+			"signer instance: %v", err)
+	}
+
+	sigParsed, err := schnorr.ParseSignature(resp.Signature)
+	if err != nil {
+		return nil, fmt.Errorf("can't parse schnorr signature: %v",
+			err)
+	}
+	return sigParsed, nil
+}
+
 // DerivePrivKey attempts to derive the private key that corresponds to the
 // passed key descriptor.  If the public key is set, then this method will
 // perform an in-order scan over the key set, with a max of MaxKeyRangeScan