Regular Show: The Movie is a 2015 American animated science fiction comedy film set within the series Regular Show. Produced by Cartoon Network Studios, the film was directed by series creator J. G. Quintel, and features the voices of William Salyers, Quintel, Sam Marin, and Mark Hamill reprising their respective roles from the series, with Jason Mantzoukas and David Koechner joining the cast. The film follows Mordecai and Rigby, along with their groundskeeping co-workers Benson, Pops, Muscle Man, Hi-Five Ghost and Skips, as they embark on a mission to save the universe, and their friendship, from a vengeful volleyball coach.

The film premiered on August 14, 2015 at The Downtown Independent theater in Los Angeles, where it was shown until August 20, 2015. The film is the third film based on a Cartoon Network property to receive a theatrical release, after The Powerpuff Girls Movie and Aqua Teen Hunger Force Colon Movie Film for Theaters, and the first Cartoon Network original film since Ed, Edd n Eddy's Big Picture Show in 2009. The film was released digitally on September 1, 2015, on DVD on October 13, 2015, and ultimately had its television premiere on November 25, 2015, on Cartoon Network.