diff --git a/android/build.gradle b/android/build.gradle
index 5b40074..52ea7a5 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -22,7 +22,13 @@ if (isNewArchitectureEnabled()) {
     apply plugin: "com.facebook.react"
 }
 apply plugin: 'com.android.library'
-apply plugin: 'org.jetbrains.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: 'org.jetbrains.kotlin.android'
+}
 
 android {
   compileSdkVersion safeExtGet('compileSdkVersion', 36)