diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index 98c491b..e6c68f9 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -1408,3 +1408,13 @@
    description: "Allow non-touchscreen devices to bypass falsing"
    bug: "319809270"
 }
+
+flag {
+   name: "media_projection_dialog_behind_lockscreen"
+   namespace: "systemui"
+   description: "Ensure MediaProjection Dialog appears behind the lockscreen"
+   bug: "351409536"
+   metadata {
+       purpose: PURPOSE_BUGFIX
+   }
+}
\ No newline at end of file
diff --git a/packages/SystemUI/src/com/android/systemui/mediaprojection/permission/MediaProjectionPermissionActivity.java b/packages/SystemUI/src/com/android/systemui/mediaprojection/permission/MediaProjectionPermissionActivity.java
index 4251b81..8351597 100644
--- a/packages/SystemUI/src/com/android/systemui/mediaprojection/permission/MediaProjectionPermissionActivity.java
+++ b/packages/SystemUI/src/com/android/systemui/mediaprojection/permission/MediaProjectionPermissionActivity.java
@@ -34,6 +34,7 @@
 import android.app.Activity;
 import android.app.ActivityOptions.LaunchCookie;
 import android.app.AlertDialog;
+import android.app.KeyguardManager;
 import android.app.StatusBarManager;
 import android.app.compat.CompatChanges;
 import android.content.Context;
@@ -83,6 +84,7 @@
     private final StatusBarManager mStatusBarManager;
     private final MediaProjectionMetricsLogger mMediaProjectionMetricsLogger;
     private final ScreenCaptureDisabledDialogDelegate mScreenCaptureDisabledDialogDelegate;
+    private final KeyguardManager mKeyguardManager;
 
     private String mPackageName;
     private int mUid;
@@ -101,11 +103,13 @@
             FeatureFlags featureFlags,
             Lazy<ScreenCaptureDevicePolicyResolver> screenCaptureDevicePolicyResolver,
             StatusBarManager statusBarManager,
+            KeyguardManager keyguardManager,
             MediaProjectionMetricsLogger mediaProjectionMetricsLogger,
             ScreenCaptureDisabledDialogDelegate screenCaptureDisabledDialogDelegate) {
         mFeatureFlags = featureFlags;
         mScreenCaptureDevicePolicyResolver = screenCaptureDevicePolicyResolver;
         mStatusBarManager = statusBarManager;
+        mKeyguardManager = keyguardManager;
         mMediaProjectionMetricsLogger = mediaProjectionMetricsLogger;
         mScreenCaptureDisabledDialogDelegate = screenCaptureDisabledDialogDelegate;
     }
@@ -208,7 +212,14 @@
         }
 
         setUpDialog(mDialog);
-        mDialog.show();
+
+        boolean shouldDismissKeyguard =
+                com.android.systemui.Flags.mediaProjectionDialogBehindLockscreen();
+        if (shouldDismissKeyguard && mKeyguardManager.isDeviceLocked()) {
+            requestDeviceUnlock();
+        } else {
+            mDialog.show();
+        }
 
         if (savedInstanceState == null) {
             mMediaProjectionMetricsLogger.notifyPermissionRequestDisplayed(mUid);
@@ -332,6 +343,16 @@
         return false;
     }
 
+    private void requestDeviceUnlock() {
+        mKeyguardManager.requestDismissKeyguard(this,
+                new KeyguardManager.KeyguardDismissCallback() {
+                    @Override
+                    public void onDismissSucceeded() {
+                        mDialog.show();
+                    }
+                });
+    }
+
     private void grantMediaProjectionPermission(
             int screenShareMode, boolean hasCastingCapabilities) {
         try {