diff --git a/library/common/src/main/java/com/google/android/exoplayer2/source/ads/AdPlaybackState.java b/library/common/src/main/java/com/google/android/exoplayer2/source/ads/AdPlaybackState.java
index b70dd10c38..c49e025bc4 100644
--- a/library/common/src/main/java/com/google/android/exoplayer2/source/ads/AdPlaybackState.java
+++ b/library/common/src/main/java/com/google/android/exoplayer2/source/ads/AdPlaybackState.java
@@ -18,15 +18,18 @@ package com.google.android.exoplayer2.source.ads;
 import static java.lang.Math.max;
 
 import android.net.Uri;
+import android.os.Bundle;
 import androidx.annotation.CheckResult;
 import androidx.annotation.IntDef;
 import androidx.annotation.Nullable;
+import com.google.android.exoplayer2.Bundleable;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.Util;
 import java.lang.annotation.Documented;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
+import java.util.ArrayList;
 import java.util.Arrays;
 import org.checkerframework.checker.nullness.compatqual.NullableType;
 
@@ -44,7 +47,7 @@ public final class AdPlaybackState {
    * <p>Instances are immutable. Call the {@code with*} methods to get new instances that have the
    * required changes.
    */
-  public static final class AdGroup {
+  public static final class AdGroup implements Bundleable {
 
     /** The number of ads in the ad group, or {@link C#LENGTH_UNSET} if unknown. */
     public final int count;
@@ -230,6 +233,59 @@ public final class AdPlaybackState {
       Arrays.fill(durationsUs, oldDurationsUsCount, newDurationsUsCount, C.TIME_UNSET);
       return durationsUs;
     }
+
+    // Bundleable implementation.
+
+    @Documented
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({FIELD_COUNT, FIELD_URIS, FIELD_STATES, FIELD_DURATIONS_US})
+    private @interface FieldNumber {}
+
+    private static final int FIELD_COUNT = 0;
+    private static final int FIELD_URIS = 1;
+    private static final int FIELD_STATES = 2;
+    private static final int FIELD_DURATIONS_US = 3;
+
+    // putParcelableArrayList actually supports null elements.
+    @SuppressWarnings("nullness:argument.type.incompatible")
+    @Override
+    public Bundle toBundle() {
+      Bundle bundle = new Bundle();
+      bundle.putInt(keyForField(FIELD_COUNT), count);
+      bundle.putParcelableArrayList(
+          keyForField(FIELD_URIS), new ArrayList<@NullableType Uri>(Arrays.asList(uris)));
+      bundle.putIntArray(keyForField(FIELD_STATES), states);
+      bundle.putLongArray(keyForField(FIELD_DURATIONS_US), durationsUs);
+      return bundle;
+    }
+
+    /** Object that can restore {@link AdGroup} from a {@link Bundle}. */
+    public static final Creator<AdGroup> CREATOR =
+        new Creator<AdGroup>() {
+
+          // getParcelableArrayList may have null elements.
+          @SuppressWarnings("nullness:type.argument.type.incompatible")
+          @Override
+          public AdGroup fromBundle(Bundle bundle) {
+            int count = bundle.getInt(keyForField(FIELD_COUNT), /* defaultValue= */ C.LENGTH_UNSET);
+            @Nullable
+            ArrayList<@NullableType Uri> uriList =
+                bundle.getParcelableArrayList(keyForField(FIELD_URIS));
+            @Nullable
+            @AdState
+            int[] states = bundle.getIntArray(keyForField(FIELD_STATES));
+            @Nullable long[] durationsUs = bundle.getLongArray(keyForField(FIELD_DURATIONS_US));
+            return new AdGroup(
+                count,
+                states == null ? new int[0] : states,
+                uriList == null ? new Uri[0] : uriList.toArray(new Uri[0]),
+                durationsUs == null ? new long[0] : durationsUs);
+          }
+        };
+
+    private static String keyForField(@AdGroup.FieldNumber int field) {
+      return Integer.toString(field, Character.MAX_RADIX);
+    }
   }
 
   /**
diff --git a/library/common/src/test/java/com/google/android/exoplayer2/source/ads/AdPlaybackStateTest.java b/library/common/src/test/java/com/google/android/exoplayer2/source/ads/AdPlaybackStateTest.java
new file mode 100644
index 0000000000..cec107859d
--- /dev/null
+++ b/library/common/src/test/java/com/google/android/exoplayer2/source/ads/AdPlaybackStateTest.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2021 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.source.ads;
+
+import static com.google.android.exoplayer2.source.ads.AdPlaybackState.AD_STATE_AVAILABLE;
+import static com.google.android.exoplayer2.source.ads.AdPlaybackState.AD_STATE_PLAYED;
+import static com.google.common.truth.Truth.assertThat;
+
+import android.net.Uri;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/** Unit tests for {@link AdPlaybackState}. */
+@RunWith(AndroidJUnit4.class)
+public class AdPlaybackStateTest {
+
+  @Test
+  public void roundtripViaBundle_ofAdGroup_yieldsEqualInstance() {
+    AdPlaybackState.AdGroup adGroup =
+        new AdPlaybackState.AdGroup()
+            .withAdCount(2)
+            .withAdState(AD_STATE_AVAILABLE, /* index= */ 0)
+            .withAdState(AD_STATE_PLAYED, /* index= */ 1)
+            .withAdUri(Uri.parse("https://www.google.com"), /* index= */ 0)
+            .withAdUri(Uri.EMPTY, /* index= */ 1)
+            .withAdDurationsUs(new long[] {1234, 5678});
+
+    assertThat(AdPlaybackState.AdGroup.CREATOR.fromBundle(adGroup.toBundle())).isEqualTo(adGroup);
+  }
+}