Asterix Versus Caesar (also known in France as Astérix et la surprise de César) is a 1985 French animated adventure comedy film written by René Goscinny, Albert Uderzo and Pierre Tchernia, and directed by Paul and Gaëtan Brizzi (in their director debuts), and is the fourth film adaptation of the Asterix comic book series. The story, which combines the plots of Asterix the Gladiator and Asterix the Legionary, sees Asterix and his friend Obelix set off to rescue two lovers from their village that had been kidnapped by the Romans. The film's theme song, Astérix est là, was composed and performed by Plastic Bertrand.

A book was released containing the story and stills from the film. It was later reprinted when Orion Publishing re-released the entire series.