I Want You Back is a 2022 American romantic comedy film directed by Jason Orley from a screenplay by Isaac Aptaker and Elizabeth Berger. It stars Charlie Day and Jenny Slate as two recently dumped strangers who team up to sabotage the new relationships of their exes. Manny Jacinto, Clark Backo, and Mason Gooding also star.

Charles Peckham Day is an American actor, writer, producer, and podcaster. He is best known for playing Charlie Kelly on the FX comedy It's Always Sunny in Philadelphia (2005–present), which he stars in with Rob McElhenney and Glenn Howerton, and of which he is also a writer and an executive producer. In 2011, he was nominated for a Critics' Choice Television Award and a Satellite Award for the role. He subsequently co-created the Fox sitcom The Cool Kids (2018–2019) with Paul Fruchbom and the Apple TV+ comedy Mythic Quest (2020–present) with Rob McElhenney and Megan Ganz, and continues to executive-produce the latter.