The X-Men are a fictional Marvel Comics superhero team. Created by Stan Lee and Jack Kirby, they debuted in The X-Men #1, published in September 1963. The X-Men are fictitious mutants who, as a result of a sudden leap in evolution, are born with latent superhuman abilities. The X-Men have also appeared on the big screen recently in X-Men, X2, and X-Men: The Last Stand. They share their names with a number of different sports teams as well.