The X-Men film series currently consists of three superhero films based on the fictional Marvel Comics team of the same name. The films star an ensemble cast, focusing on Hugh Jackman as Wolverine, as he is drawn into the conflict between Professor Xavier and Magneto, who have opposing views on humanity's relationship with mutants: Xavier believes humanity and mutants can coexist, but Magneto believes a war is coming, and intends to fight. The films also developed subplots based on the comics' Weapon X and Dark Phoenix storylines.

Twentieth Century Fox earned the film rights to the characters in 1994, and after numerous drafts, Bryan Singer was hired to direct X-Men for a 2000 release. Singer returned for the 2003 sequel X2, but left a potential third and fourth film to direct Superman Returns. Brett Ratner directed X-Men: The Last Stand for a 2006 release. Critics praised Singer's films for their dark, realistic tone, and focus on a homophobia subtext, but Ratner's film was met with mixed reviews. Nonetheless, each film outgrossed the last, and Fox is developing spin-offs set before the three films. The X-Men films are also attributed as leading to a reemergence of superhero films in the 2000s, such as the Spider-Man film series.