diff --git a/android/build.gradle b/android/build.gradle
index 7e46c0b..46748a9 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -17,7 +17,14 @@ def safeExtGet(prop, fallback) {
 }
 
 apply plugin: 'com.android.library'
-apply plugin: 'kotlin-android'
+// AGP 9 ships built-in Kotlin support and registers the `kotlin` extension
+// itself. Applying the Kotlin plugin on top of it fails configuration with
+// "Cannot add extension with name 'kotlin'". Only apply it when nothing has
+// registered that extension yet.
+if (project.extensions.findByName('kotlin') == null) {
+  apply plugin: 'kotlin-android'
+}
+
 apply plugin: 'com.facebook.react'
 
 android {