Released: 2003
Director: Bryan Singer
Starring: Hugh Jackman, Halle Berry, James Marsden, Anna Paquin, Patrick Stewart, Ian McKellen, Famke Janssen, Brian Cox

After a well-received, but lackluster first run, Singer and the merry mutants took it back to the lab and introduced fan favorites like Nightcrawler, invoking classic Chris Claremont storylines from the '70s comics. Oh, and they made the whole mutant thing an analogy for being gay. Not that there's anything wrong with that.

YOU AUGHTA KNOW:
Ian McKellen admitted on a late-night talk show that he hadn't watched X2 until years after the film's release—and that he quite enjoyed it.