diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 65b81f2698..b32c6e5fd8 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -151,6 +151,7 @@
     *   Add support for playing JPEG motion photos
         ([#5405](https://github.com/google/ExoPlayer/issues/5405)).
 *   Track selection:
+    *   Moved `Player.getTrackSelector` to the `ExoPlayer` interface.
     *   Allow parallel adaptation for video and audio
         ([#5111](https://github.com/google/ExoPlayer/issues/5111)).
     *   Simplified enabling tunneling with `DefaultTrackSelector`.
diff --git a/extensions/cast/src/main/java/com/google/android/exoplayer2/ext/cast/CastPlayer.java b/extensions/cast/src/main/java/com/google/android/exoplayer2/ext/cast/CastPlayer.java
index d4d7b4ae60..7ac24b4f8d 100644
--- a/extensions/cast/src/main/java/com/google/android/exoplayer2/ext/cast/CastPlayer.java
+++ b/extensions/cast/src/main/java/com/google/android/exoplayer2/ext/cast/CastPlayer.java
@@ -33,7 +33,6 @@ import com.google.android.exoplayer2.source.TrackGroupArray;
 import com.google.android.exoplayer2.trackselection.FixedTrackSelection;
 import com.google.android.exoplayer2.trackselection.TrackSelection;
 import com.google.android.exoplayer2.trackselection.TrackSelectionArray;
-import com.google.android.exoplayer2.trackselection.TrackSelector;
 import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.Clock;
 import com.google.android.exoplayer2.util.ListenerSet;
@@ -506,12 +505,6 @@ public final class CastPlayer extends BasePlayer {
     }
   }
 
-  @Override
-  @Nullable
-  public TrackSelector getTrackSelector() {
-    return null;
-  }
-
   @Override
   public void setRepeatMode(@RepeatMode int repeatMode) {
     if (remoteMediaClient == null) {
diff --git a/library/common/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelectorInterface.java b/library/common/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelectorInterface.java
deleted file mode 100644
index abd4b32480..0000000000
--- a/library/common/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelectorInterface.java
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.google.android.exoplayer2.trackselection;
-
-// TODO(b/172315872) Replace @code by @link when Player has been migrated to common
-/**
- * The component of a {@code Player} responsible for selecting tracks to be played.
- *
- * <p>No Player agnostic track selection is currently supported. Clients should downcast to the
- * implementation's track selection.
- */
-// TODO(b/172315872) Define an interface for track selection.
-public interface TrackSelectorInterface {}
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/ExoPlayer.java b/library/core/src/main/java/com/google/android/exoplayer2/ExoPlayer.java
index 047971bf85..9169271d12 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/ExoPlayer.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/ExoPlayer.java
@@ -449,7 +449,9 @@ public interface ExoPlayer extends Player {
     }
   }
 
-  @Override
+  /**
+   * Returns the track selector that this player uses, or null if track selection is not supported.
+   */
   @Nullable
   TrackSelector getTrackSelector();
 
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/Player.java b/library/core/src/main/java/com/google/android/exoplayer2/Player.java
index 667d26e761..d88821ae2d 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/Player.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/Player.java
@@ -34,7 +34,6 @@ import com.google.android.exoplayer2.source.TrackGroupArray;
 import com.google.android.exoplayer2.text.Cue;
 import com.google.android.exoplayer2.text.TextOutput;
 import com.google.android.exoplayer2.trackselection.TrackSelectionArray;
-import com.google.android.exoplayer2.trackselection.TrackSelectorInterface;
 import com.google.android.exoplayer2.util.MutableFlags;
 import com.google.android.exoplayer2.util.Util;
 import com.google.android.exoplayer2.video.VideoFrameMetadataListener;
@@ -1380,12 +1379,6 @@ public interface Player {
    */
   int getRendererType(int index);
 
-  /**
-   * Returns the track selector that this player uses, or null if track selection is not supported.
-   */
-  @Nullable
-  TrackSelectorInterface getTrackSelector();
-
   /** Returns the available track groups. */
   TrackGroupArray getCurrentTrackGroups();
 
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelector.java b/library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelector.java
index f3d59d537e..59c5d5447b 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelector.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelector.java
@@ -83,7 +83,7 @@ import com.google.android.exoplayer2.util.Assertions;
  * thread. The track selector may call {@link InvalidationListener#onTrackSelectionsInvalidated()}
  * from any thread.
  */
-public abstract class TrackSelector implements TrackSelectorInterface {
+public abstract class TrackSelector {
 
   /**
    * Notified when selections previously made by a {@link TrackSelector} are no longer valid.
diff --git a/library/ui/src/main/java/com/google/android/exoplayer2/ui/StyledPlayerControlView.java b/library/ui/src/main/java/com/google/android/exoplayer2/ui/StyledPlayerControlView.java
index ea9f4508a3..464bb5a477 100644
--- a/library/ui/src/main/java/com/google/android/exoplayer2/ui/StyledPlayerControlView.java
+++ b/library/ui/src/main/java/com/google/android/exoplayer2/ui/StyledPlayerControlView.java
@@ -51,6 +51,7 @@ import androidx.recyclerview.widget.RecyclerView;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.ControlDispatcher;
 import com.google.android.exoplayer2.DefaultControlDispatcher;
+import com.google.android.exoplayer2.ExoPlayer;
 import com.google.android.exoplayer2.ExoPlayerLibraryInfo;
 import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.PlaybackPreparer;
@@ -66,6 +67,7 @@ import com.google.android.exoplayer2.trackselection.DefaultTrackSelector.Selecti
 import com.google.android.exoplayer2.trackselection.MappingTrackSelector.MappedTrackInfo;
 import com.google.android.exoplayer2.trackselection.TrackSelection;
 import com.google.android.exoplayer2.trackselection.TrackSelectionArray;
+import com.google.android.exoplayer2.trackselection.TrackSelector;
 import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.RepeatModeUtil;
 import com.google.android.exoplayer2.util.Util;
@@ -759,8 +761,11 @@ public class StyledPlayerControlView extends FrameLayout {
     if (player != null) {
       player.addListener(componentListener);
     }
-    if (player != null && player.getTrackSelector() instanceof DefaultTrackSelector) {
-      this.trackSelector = (DefaultTrackSelector) player.getTrackSelector();
+    if (player instanceof ExoPlayer) {
+      TrackSelector trackSelector = ((ExoPlayer) player).getTrackSelector();
+      if (trackSelector instanceof DefaultTrackSelector) {
+        this.trackSelector = (DefaultTrackSelector) trackSelector;
+      }
     } else {
       this.trackSelector = null;
     }