Teen Titans Go! vs. Teen Titans is a 2019 American animated direct-to-video superhero comedy film that serves as a crossover between the television series Teen Titans Go! and the original Teen Titans, both of which are adapted from the DC Comics superhero team of the same name. It is also the second film of both the Teen Titans Go! series and the regular Teen Titans series, after both Teen Titans Go! To the Movies (2018) and Teen Titans: Trouble in Tokyo (2006). The film premiered at Comic-Con on July 21, 2019, followed by a digital release on September 24, then followed by a DVD and Blu-ray release on October 15. The events of the film take place during the fifth season of Teen Titans Go! and after the finale of the fifth season of Teen Titans. The film premiered on television on Cartoon Network on February 17, 2020.

The film received generally positive reviews from critics.

This was the final film appearance of Robert Morse before his death in 2022.