X-Men is an American superhero film series based on the fictional superhero team of the same name, who originally appeared in a series of comic books created by Stan Lee and Jack Kirby and published by Marvel Comics. 20th Century Fox obtained the film rights to the characters in 1994, and after numerous drafts, Bryan Singer was hired to direct the first film and its sequel, X2 (2003), while Brett Ratner directed X-Men: The Last Stand (2006).
After each film earned higher box office grosses than its predecessor, several spin-off films were released, including a Wolverine trilogy from 2009 to 2017 and a Deadpool duology from 2016 to 2018. Three X-Men prequels were also released from 2011 to 2016.
X-Men, X2: X-Men United, X-Men: First Class, The Wolverine, X-Men: Days of Future Past, Deadpool, Logan and Deadpool 2 were all met with positive reviews from critics, X-Men: The Last Stand and X-Men: Apocalypse were met with mixed reviews, while X-Men Origins: Wolverine received negative reviews.
With eleven films released, the X-Men film series is the sixth highest-grossing film series, having grossed over US$5.7 billion worldwide. It is set to continue with the releases of Dark Phoenix and The New Mutants in 2019 and Gambit in 2020.