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 X-Men (2000) 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 trilogy focused on the character of Wolverine: X-Men Origins: Wolverine (2009), The Wolverine (2013) and Logan (2017). A prequel, X-Men: First Class, was released in 2011, followed by sequels X-Men: Days of Future Past (2014) (also a sequel to X-Men: The Last Stand), and X-Men: Apocalypse (2016). A spin-off film, Deadpool (2016) was also released.
X-Men, X2, X-Men: First Class, The Wolverine, X-Men: Days of Future Past, Deadpool and Logan 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 ten films released, the X-Men film series is the seventh highest-grossing film series, having grossed over US$4.9 billion worldwide. It is set to continue with the releases of Deadpool 2 and X-Men: Dark Phoenix in 2018, and The New Mutants in 2019.