diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 63834978fd..fb3b33d696 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -1,10 +1,85 @@
 # Release notes #
 
-### r2.x ###
+### r2.0.0 ###
 
-ExoPlayer 2.x is a major rewrite that's still under development. We suggest
-following our [Medium page](https://medium.com/google-exoplayer) to learn more,
-as we work toward writing more complete documentation and the first 2.x release.
+ExoPlayer 2.x is a major iteration of the library. It includes significant API
+and architectural changes, new features and many bug fixes. You can read about
+some of the motivations behind ExoPlayer 2.x
+[here](https://medium.com/google-exoplayer/exoplayer-2-x-why-what-and-when-74fd9cb139#.am7h8nytm).
+
+* Root package name changed to `com.google.android.exoplayer2`. The library
+  structure and class names have also been sanitized. Read more
+  [here](https://medium.com/google-exoplayer/exoplayer-2-x-new-package-and-class-names-ef8e1d9ba96f#.lv8sd4nez).
+* Key architectural changes:
+ * Late binding between rendering and media source components. Allows the same
+   rendering components to be re-used from one playback to another. Enables
+   features such as gapless playback through playlists and DASH multi-period
+   support.
+ * Improved track selection design. More details can be found
+   [here](https://medium.com/google-exoplayer/exoplayer-2-x-track-selection-2b62ff712cc9#.n00zo76b6).
+ * LoadControl now used to control buffering and loading across all playback
+   types.
+ * Media source components given additional structure. A new MediaSource class
+   has been introduced. MediaSources expose Timelines that describe the media
+   they expose, and can consist of multiple MediaPeriods. This enables features
+   such as seeking in live playbacks and DASH multi-period support.
+ * Responsibility for loading the initial DASH/SmoothStreaming/HLS manifest is
+   promoted to the corresponding MediaSource components and is no longer the
+   application's responsibility.
+ * Higher level abstractions such as SimpleExoPlayer have been added to the
+   library. These make the library easier to use for common use cases. The demo
+   app is halved in size as a result, whilst at the same time gaining more
+   functionality. Read more
+   [here](https://medium.com/google-exoplayer/exoplayer-2-x-improved-demo-app-d97171aaaaa1).
+ * Enhanced library support for implementing audio extensions. Read more
+   [here](https://medium.com/google-exoplayer/exoplayer-2-x-new-audio-features-cfb26c2883a#.ua75vu4s3).
+ * Format and MediaFormat are replaced by a single Format class.
+* Key new features:
+ * Playlist support. Includes support for gapless playback between playlist
+   items and consistent application of LoadControl and TrackSelector policies
+   when transitioning between items
+   ([#1270](https://github.com/google/ExoPlayer/issues/1270)).
+ * Seeking in live playbacks for DASH and SmoothStreaming
+   ([#291](https://github.com/google/ExoPlayer/issues/291)).
+ * DASH multi-period support
+   ([#557](https://github.com/google/ExoPlayer/issues/557)).
+ * MediaSource composition allows MediaSources to be concatenated into a
+   playlist, merged and looped. Read more
+   [here](https://medium.com/google-exoplayer/exoplayer-2-x-mediasource-composition-6c285fcbca1f#.zfha8qupz).
+ * Looping support (see above)
+   ([#490](https://github.com/google/ExoPlayer/issues/490)).
+ * Ability to query information about all tracks in a piece of media (including
+   those not supported by the device)
+  ([#1121](https://github.com/google/ExoPlayer/issues/1121)).
+ * Improved player controls.
+ * Support for PSSH in fMP4 moof atoms
+   ([#1143](https://github.com/google/ExoPlayer/issues/1143)).
+ * Support for Opus in Ogg
+   ([#1447](https://github.com/google/ExoPlayer/issues/1447)).
+ * CacheDataSource support for standalone media file playbacks (mp3, mp4 etc).
+ * FFMPEG extension (for audio only).
+* Key bug fixes:
+ * Removed unnecessary secondary requests when playing standalone media files
+   ([#1041](https://github.com/google/ExoPlayer/issues/1041)).
+ * Fixed playback of video only (i.e. no audio) live streams
+   ([#758](https://github.com/google/ExoPlayer/issues/758)).
+ * Fixed silent failure when media buffer is too small
+   ([#583](https://github.com/google/ExoPlayer/issues/583)).
+ * Suppressed "Sending message to a Handler on a dead thread" warnings
+   ([#426](https://github.com/google/ExoPlayer/issues/426)).
+
+### r1.5.11 ###
+
+* Cronet network stack extension.
+* HLS: Fix propagation of language for alternative audio renditions
+  ([#1784](https://github.com/google/ExoPlayer/issues/1784)).
+* WebM: Support for subsample encryption.
+* ID3: Fix EOS detection for 2-byte encodings
+  ([#1774](https://github.com/google/ExoPlayer/issues/1774)).
+* MPEG-TS: Support multiple tracks of the same type.
+* MPEG-TS: Work toward robust handling of stream corruption.
+* Fix ContentDataSource failures triggered by garbage collector
+  ([#1759](https://github.com/google/ExoPlayer/issues/1759)).
 
 ### r1.5.10 ###