diff --git a/core/java/android/content/om/IOverlayManager.aidl b/core/java/android/content/om/IOverlayManager.aidl
index 722c128..43a4fe5 100644
--- a/core/java/android/content/om/IOverlayManager.aidl
+++ b/core/java/android/content/om/IOverlayManager.aidl
@@ -152,4 +152,9 @@
      * @param userId The user for which to change the overlay.
      */
     boolean setLowestPriority(in String packageName, in int userId);
+
+    /**
+     * Returns the list of default overlay packages, or an empty array if there are none.
+     */
+    String[] getDefaultOverlayPackages();
 }
diff --git a/services/core/java/com/android/server/om/OverlayManagerService.java b/services/core/java/com/android/server/om/OverlayManagerService.java
index ee07c7d..209ccda 100644
--- a/services/core/java/com/android/server/om/OverlayManagerService.java
+++ b/services/core/java/com/android/server/om/OverlayManagerService.java
@@ -720,6 +720,26 @@
         }
 
         @Override
+        public String[] getDefaultOverlayPackages() throws RemoteException {
+            try {
+                traceBegin(TRACE_TAG_RRO, "OMS#getDefaultOverlayPackages");
+                getContext().enforceCallingOrSelfPermission(
+                        android.Manifest.permission.MODIFY_THEME_OVERLAY, null);
+
+                final long ident = Binder.clearCallingIdentity();
+                try {
+                    synchronized (mLock) {
+                        return mImpl.getDefaultOverlayPackages();
+                    }
+                } finally {
+                    Binder.restoreCallingIdentity(ident);
+                }
+            } finally {
+                traceEnd(TRACE_TAG_RRO);
+            }
+        }
+
+        @Override
         public void onShellCommand(@NonNull final FileDescriptor in,
                 @NonNull final FileDescriptor out, @NonNull final FileDescriptor err,
                 @NonNull final String[] args, @NonNull final ShellCallback callback,
diff --git a/services/core/java/com/android/server/om/OverlayManagerServiceImpl.java b/services/core/java/com/android/server/om/OverlayManagerServiceImpl.java
index 3a84b1e..092dbc8 100644
--- a/services/core/java/com/android/server/om/OverlayManagerServiceImpl.java
+++ b/services/core/java/com/android/server/om/OverlayManagerServiceImpl.java
@@ -641,6 +641,10 @@
         pw.println("Default overlays: " + TextUtils.join(";", mDefaultOverlays));
     }
 
+    @NonNull String[] getDefaultOverlayPackages() {
+        return mDefaultOverlays;
+    }
+
     List<String> getEnabledOverlayPackageNames(@NonNull final String targetPackageName,
             final int userId) {
         final List<OverlayInfo> overlays = mSettings.getOverlaysForTarget(targetPackageName,