15 More Actors You Totally Forgot Were In Comic Book Movies

15. Michael Fassbender

The Movie: 300 (2007)

Who He Played: Stelios, the Spartan warrior who got the honor of killing Xerxes' army general near the end of the film.

Why You Forgot: A decade ago, few really knew who Fassbender was. 300 truly kicked off Fassbender's film career, but it wasn't until his later roles in films including Inglourious Basterds, Prometheus, 12 Years a Slave and, of course, X-Men: First Class and Days of Future Past that he quickly moved up to the big leagues.