Justice League: Crisis on Two Earths is a 2010 American animated superhero film directed by Lauren Montgomery and Sam Liu and written by Dwayne McDuffie. It is based on the abandoned direct-to-video feature Justice League: Worlds Collide, which was intended as a bridge between the DC Animated Universe series Justice League and Justice League Unlimited, and reworked to act as a standalone story.

The DC Animated Universe is a shared universe centered on a group of animated television series based on DC Comics and produced by Warner Bros. Animation. It began with Batman: The Animated Series in 1992 and ended with Justice League Unlimited in 2006. The associated media franchise also includes theatrical and direct-to-video feature films, as well as shorts, comic books, video games, and other multimedia adaptations.