diff --git a/packages/keyring-controller/CHANGELOG.md b/packages/keyring-controller/CHANGELOG.md
index 52ca3f75e4..4356dbe4b3 100644
--- a/packages/keyring-controller/CHANGELOG.md
+++ b/packages/keyring-controller/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Expose `KeyringController:signTransaction` method through `KeyringController` messenger ([#8408](https://github.com/MetaMask/core/pull/8408))
+
 ### Changed
 
 - Bump `@metamask/messenger` from `^1.0.0` to `^1.1.1` ([#8364](https://github.com/MetaMask/core/pull/8364), [#8373](https://github.com/MetaMask/core/pull/8373))
diff --git a/packages/keyring-controller/src/KeyringController-method-action-types.ts b/packages/keyring-controller/src/KeyringController-method-action-types.ts
index 4a25c520bc..e169b7d361 100644
--- a/packages/keyring-controller/src/KeyringController-method-action-types.ts
+++ b/packages/keyring-controller/src/KeyringController-method-action-types.ts
@@ -194,6 +194,19 @@ export type KeyringControllerSignTypedMessageAction = {
   handler: KeyringController['signTypedMessage'];
 };
 
+/**
+ * Signs a transaction by calling down into a specific keyring.
+ *
+ * @param transaction - Transaction object to sign. Must be a `ethereumjs-tx` transaction instance.
+ * @param from - Address to sign from, should be in keychain.
+ * @param opts - An optional options object.
+ * @returns Promise resolving to a signed transaction string.
+ */
+export type KeyringControllerSignTransactionAction = {
+  type: `KeyringController:signTransaction`;
+  handler: KeyringController['signTransaction'];
+};
+
 /**
  * Convert a base transaction to a base UserOperation.
  *
@@ -316,6 +329,7 @@ export type KeyringControllerMethodActions =
   | KeyringControllerSignEip7702AuthorizationAction
   | KeyringControllerSignPersonalMessageAction
   | KeyringControllerSignTypedMessageAction
+  | KeyringControllerSignTransactionAction
   | KeyringControllerPrepareUserOperationAction
   | KeyringControllerPatchUserOperationAction
   | KeyringControllerSignUserOperationAction
diff --git a/packages/keyring-controller/src/KeyringController.ts b/packages/keyring-controller/src/KeyringController.ts
index 6c12c6e948..9e2dc7212d 100644
--- a/packages/keyring-controller/src/KeyringController.ts
+++ b/packages/keyring-controller/src/KeyringController.ts
@@ -51,6 +51,7 @@ const MESSENGER_EXPOSED_METHODS = [
   'signMessage',
   'signEip7702Authorization',
   'signPersonalMessage',
+  'signTransaction',
   'signTypedMessage',
   'decryptMessage',
   'getEncryptionPublicKey',
diff --git a/packages/keyring-controller/src/index.ts b/packages/keyring-controller/src/index.ts
index 320131ba58..d52a7bc9e2 100644
--- a/packages/keyring-controller/src/index.ts
+++ b/packages/keyring-controller/src/index.ts
@@ -14,6 +14,7 @@ export type {
   KeyringControllerSignMessageAction,
   KeyringControllerSignEip7702AuthorizationAction,
   KeyringControllerSignPersonalMessageAction,
+  KeyringControllerSignTransactionAction,
   KeyringControllerSignTypedMessageAction,
   KeyringControllerPrepareUserOperationAction,
   KeyringControllerPatchUserOperationAction,