diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/JSInstance.java b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/JSInstance.kt
similarity index 75%
rename from packages/react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/JSInstance.java
rename to packages/react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/JSInstance.kt
index e4eef1716ea..b5d5c2d3b1a 100644
--- a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/JSInstance.java
+++ b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/JSInstance.kt
@@ -5,14 +5,15 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-package com.facebook.react.bridge;
+package com.facebook.react.bridge
 
 /**
  * This interface includes the methods needed to use a running JS instance, without specifying any
  * of the bridge-specific initialization or lifecycle management.
  */
-interface JSInstance {
-  void invokeCallback(int callbackID, NativeArrayInterface arguments);
+internal interface JSInstance {
+  public fun invokeCallback(callbackID: Int, arguments: NativeArrayInterface)
+
   // TODO if this interface survives refactoring, think about adding
   // callFunction.
 }