You love the X-Men movies, that's a given. But did you know that they're based on an incredibly popular, iconic, decades-old comic book series? Gasp! They are (you knew that), and sometimes -- OK, a lot of times -- the storylines in the movies don't match up with those inked on the pages of the comics. Just how often does this happen? You tell us.
Take the quiz below and test your knowledge of the X-Men comic books vs. the movies.