OK K.O.! Let's Save the Universe/Home media

Theatrical release
The film is to release theatrically in the United States on March 22, 2019 in 3D and RealD 3D by Warner Bros., on the same year as Cartoon Network's previous film Steven Universe: The Movie. The film will also be preceded by Going NOT Hero!!, a short film based on Cartoon Network's Ben 10, an animated reboot series of the same name.

Home media release
The film will release on Digital HD on June 4, 2019, and on Blu-ray, DVD, and 4K-Ultra HD on June 25, 2019, by Warner Bros. Home Entertainment. It contains the deleted scenes, a Ben 10 short film Going NOT Hero!!, the 18-minute featurette, the behind-the-scenes look at ''OK K.O.! Let's Save The Universe, featuring interviews with most of the principal cast and crew, animatics, the pilot episode, the audio commentaries and the sneak peek of The Amazing World of Gumball: The Movie 2''.