diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarBackgroundRenderer.kt b/quickstep/src/com/android/launcher3/taskbar/TaskbarBackgroundRenderer.kt
index abd467d..a948fb3 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarBackgroundRenderer.kt
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarBackgroundRenderer.kt
@@ -44,8 +44,12 @@
     private var keyShadowDistance = 0f
     private var bottomMargin = 0
 
-    private val leftCornerRadius = context.leftCornerRadius.toFloat()
-    private val rightCornerRadius = context.rightCornerRadius.toFloat()
+    private val fullLeftCornerRadius = context.leftCornerRadius.toFloat()
+    private val fullRightCornerRadius = context.rightCornerRadius.toFloat()
+    private var leftCornerRadius = fullLeftCornerRadius
+    private var rightCornerRadius = fullRightCornerRadius
+    private val square: Path = Path()
+    private val circle: Path = Path()
     private val invertedLeftCornerPath: Path = Path()
     private val invertedRightCornerPath: Path = Path()
 
@@ -63,13 +67,29 @@
             keyShadowDistance = res.getDimension(R.dimen.transient_taskbar_key_shadow_distance)
         }
 
+        setCornerRoundness(DEFAULT_ROUNDNESS)
+    }
+
+    /**
+     * Sets the roundness of the round corner above Taskbar. No effect on transient Taskkbar.
+     * @param cornerRoundness 0 has no round corner, 1 has complete round corner.
+     */
+    fun setCornerRoundness(cornerRoundness: Float) {
+        if (isTransientTaskbar && !transientBackgroundBounds.isEmpty) {
+            return
+        }
+
+        leftCornerRadius = fullLeftCornerRadius * cornerRoundness
+        rightCornerRadius = fullRightCornerRadius * cornerRoundness
+
         // Create the paths for the inverted rounded corners above the taskbar. Start with a filled
         // square, and then subtract out a circle from the appropriate corner.
-        val square = Path()
+        square.reset()
         square.addRect(0f, 0f, leftCornerRadius, leftCornerRadius, Path.Direction.CW)
-        val circle = Path()
+        circle.reset()
         circle.addCircle(leftCornerRadius, 0f, leftCornerRadius, Path.Direction.CW)
         invertedLeftCornerPath.op(square, circle, Path.Op.DIFFERENCE)
+
         square.reset()
         square.addRect(0f, 0f, rightCornerRadius, rightCornerRadius, Path.Direction.CW)
         circle.reset()
@@ -121,4 +141,8 @@
 
         canvas.restore()
     }
+
+    companion object {
+        const val DEFAULT_ROUNDNESS = 1f
+    }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
index 9c2d21e..fc20753 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
@@ -23,6 +23,7 @@
 
 import com.android.launcher3.taskbar.allapps.TaskbarAllAppsController;
 import com.android.launcher3.taskbar.overlay.TaskbarOverlayController;
+import com.android.quickstep.AnimatedFloat;
 import com.android.systemui.shared.rotation.RotationButtonController;
 
 import java.io.PrintWriter;
@@ -58,6 +59,7 @@
     public final TaskbarOverlayController taskbarOverlayController;
 
     @Nullable private LoggableTaskbarController[] mControllersToLog = null;
+    @Nullable private BackgroundRendererController[] mBackgroundRendererControllers = null;
 
     /** Do not store this controller, as it may change at runtime. */
     @NonNull public TaskbarUIController uiController = TaskbarUIController.DEFAULT;
@@ -67,6 +69,9 @@
 
     @Nullable private TaskbarSharedState mSharedState = null;
 
+    // Roundness property for round corner above taskbar .
+    private final AnimatedFloat mCornerRoundness = new AnimatedFloat(this::updateCornerRoundness);
+
     public TaskbarControllers(TaskbarActivityContext taskbarActivityContext,
             TaskbarDragController taskbarDragController,
             TaskbarNavButtonController navButtonController,
@@ -148,6 +153,11 @@
                 taskbarAutohideSuspendController, taskbarPopupController, taskbarInsetsController,
                 voiceInteractionWindowController
         };
+        mBackgroundRendererControllers = new BackgroundRendererController[] {
+                taskbarDragLayerController, taskbarScrimViewController,
+                voiceInteractionWindowController
+        };
+        mCornerRoundness.updateValue(TaskbarBackgroundRenderer.DEFAULT_ROUNDNESS);
 
         mAreAllControllersInitialized = true;
         for (Runnable postInitCallback : mPostInitCallbacks) {
@@ -191,6 +201,7 @@
         taskbarRecentAppsController.onDestroy();
 
         mControllersToLog = null;
+        mBackgroundRendererControllers = null;
     }
 
     /**
@@ -224,6 +235,23 @@
         rotationButtonController.dumpLogs(prefix + "\t", pw);
     }
 
+    /**
+     * Returns a float property that animates roundness of the round corner above Taskbar.
+     */
+    public AnimatedFloat getTaskbarCornerRoundness() {
+        return mCornerRoundness;
+    }
+
+    private void updateCornerRoundness() {
+        if (mBackgroundRendererControllers == null) {
+            return;
+        }
+
+        for (BackgroundRendererController controller : mBackgroundRendererControllers) {
+            controller.setCornerRoundness(mCornerRoundness.value);
+        }
+    }
+
     @VisibleForTesting
     TaskbarActivityContext getTaskbarActivityContext() {
         // Used to mock
@@ -233,4 +261,12 @@
     protected interface LoggableTaskbarController {
         void dumpLogs(String prefix, PrintWriter pw);
     }
+
+    protected interface BackgroundRendererController {
+        /**
+         * Sets the roundness of the round corner above Taskbar.
+         * @param cornerRoundness 0 has no round corner, 1 has complete round corner.
+         */
+        void setCornerRoundness(float cornerRoundness);
+    }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
index 7c9a13c..41f3965 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
@@ -158,6 +158,15 @@
         invalidate();
     }
 
+    /**
+     * Sets the roundness of the round corner above Taskbar.
+     * @param cornerRoundness 0 has no round corner, 1 has complete round corner.
+     */
+    protected void setCornerRoundness(float cornerRoundness) {
+        mBackgroundRenderer.setCornerRoundness(cornerRoundness);
+        invalidate();
+    }
+
     @Override
     public boolean dispatchTouchEvent(MotionEvent ev) {
         TestLogging.recordMotionEvent(TestProtocol.SEQUENCE_MAIN, "Touch event", ev);
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java
index 13ecf81..9765a41 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java
@@ -32,7 +32,8 @@
 /**
  * Handles properties/data collection, then passes the results to TaskbarDragLayer to render.
  */
-public class TaskbarDragLayerController implements TaskbarControllers.LoggableTaskbarController {
+public class TaskbarDragLayerController implements TaskbarControllers.LoggableTaskbarController,
+        TaskbarControllers.BackgroundRendererController {
 
     private final TaskbarActivityContext mActivity;
     private final TaskbarDragLayer mTaskbarDragLayer;
@@ -138,6 +139,11 @@
         updateNavBarDarkIntensityMultiplier();
     }
 
+    @Override
+    public void setCornerRoundness(float cornerRoundness) {
+        mTaskbarDragLayer.setCornerRoundness(cornerRoundness);
+    }
+
     private void updateNavBarDarkIntensityMultiplier() {
         // Zero out the app-requested dark intensity when we're drawing our own background.
         float effectiveBgAlpha = mLastSetBackgroundAlpha * (1 - mBgOffset.value);
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
index 723e214..fc26f5f 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
@@ -73,6 +73,7 @@
 
     private TaskbarControllers mControllers;
     private AnimatedFloat mTaskbarBackgroundAlpha;
+    private AnimatedFloat mTaskbarCornerRoundness;
     private MultiProperty mIconAlphaForHome;
     private QuickstepLauncher mLauncher;
 
@@ -133,6 +134,7 @@
 
         mTaskbarBackgroundAlpha = mControllers.taskbarDragLayerController
                 .getTaskbarBackgroundAlpha();
+        mTaskbarCornerRoundness = mControllers.getTaskbarCornerRoundness();
         mIconAlphaForHome = mControllers.taskbarViewController
                 .getTaskbarIconAlpha().get(ALPHA_INDEX_HOME);
 
@@ -316,6 +318,19 @@
                     .setDuration(duration));
         }
 
+        float cornerRoundness = goingToLauncher ? 0 : 1;
+        // Don't animate if corner roundness has reached desired value.
+        if (mTaskbarCornerRoundness.isAnimating()
+                || mTaskbarCornerRoundness.value != cornerRoundness) {
+            mTaskbarCornerRoundness.cancelAnimation();
+            if (DEBUG) {
+                Log.d(TAG, "onStateChangeApplied - taskbarCornerRoundness - "
+                        + mTaskbarCornerRoundness.value
+                        + " -> " + cornerRoundness + ": " + duration);
+            }
+            animatorSet.play(mTaskbarCornerRoundness.animateToValue(cornerRoundness));
+        }
+
         if (mIconAlignment.isAnimatingToValue(toAlignment)
                 || mIconAlignment.isSettledOnValue(toAlignment)) {
             // Already at desired value, but make sure we run the callback at the end.
@@ -333,6 +348,7 @@
             }
             animatorSet.play(iconAlignAnim);
         }
+
         animatorSet.setInterpolator(EMPHASIZED);
 
         if (start) {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimView.java
index 1d3757f..cdc6d59 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimView.java
@@ -69,4 +69,13 @@
         mRenderer.getPaint().setAlpha((int) (alpha * 255));
         invalidate();
     }
+
+    /**
+     * Sets the roundness of the round corner above Taskbar.
+     * @param cornerRoundness 0 has no round corner, 1 has complete round corner.
+     */
+    protected void setCornerRoundness(float cornerRoundness) {
+        mRenderer.setCornerRoundness(cornerRoundness);
+        invalidate();
+    }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java
index c3b0f57..ce191b7 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java
@@ -30,7 +30,8 @@
 /**
  * Handles properties/data collection, and passes the results to {@link TaskbarScrimView} to render.
  */
-public class TaskbarScrimViewController implements TaskbarControllers.LoggableTaskbarController {
+public class TaskbarScrimViewController implements TaskbarControllers.LoggableTaskbarController,
+        TaskbarControllers.BackgroundRendererController {
 
     private static final float SCRIM_ALPHA = 0.6f;
 
@@ -95,6 +96,11 @@
     }
 
     @Override
+    public void setCornerRoundness(float cornerRoundness) {
+        mScrimView.setCornerRoundness(cornerRoundness);
+    }
+
+    @Override
     public void dumpLogs(String prefix, PrintWriter pw) {
         pw.println(prefix + "TaskbarScrimViewController:");
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/VoiceInteractionWindowController.kt b/quickstep/src/com/android/launcher3/taskbar/VoiceInteractionWindowController.kt
index 837af58..a033507 100644
--- a/quickstep/src/com/android/launcher3/taskbar/VoiceInteractionWindowController.kt
+++ b/quickstep/src/com/android/launcher3/taskbar/VoiceInteractionWindowController.kt
@@ -14,7 +14,8 @@
  * Controls Taskbar behavior while Voice Interaction Window (assistant) is showing.
  */
 class VoiceInteractionWindowController(val context: TaskbarActivityContext)
-    : TaskbarControllers.LoggableTaskbarController {
+    : TaskbarControllers.LoggableTaskbarController,
+        TaskbarControllers.BackgroundRendererController {
 
     private val taskbarBackgroundRenderer = TaskbarBackgroundRenderer(context)
 
@@ -111,6 +112,11 @@
         }
     }
 
+    override fun setCornerRoundness(cornerRoundness: Float) {
+        taskbarBackgroundRenderer.setCornerRoundness(cornerRoundness)
+        separateWindowForTaskbarBackground.invalidate()
+    }
+
     override fun dumpLogs(prefix: String, pw: PrintWriter) {
         pw.println(prefix + "VoiceInteractionWindowController:")
         pw.println("$prefix\tisVoiceInteractionWindowVisible=$isVoiceInteractionWindowVisible")