Christopher S. Claremont (born November 25, 1950) is a British-born American comic book writer and novelist, known for his 1975–1991 stint on Uncanny X-Men, far longer than that of any other writer, during which he is credited with developing strong female characters as well as introducing complex literary themes into superhero narratives, turning the once underachieving comic into one of Marvel's most popular series.
During his tenure at Marvel, Claremont co-created numerous X-Men characters, such as Rogue, Psylocke, Kitty Pryde, Phoenix, The Brood, Lockheed, Shi'ar, Shi'ar Imperial Guard, Mystique, Destiny, Selene, Reverend William Stryker, Lady Mastermind, Emma Frost, Tessa, Siryn, Jubilee, Rachel Summers, Madelyne Pryor, Moira MacTaggert, Lilandra, Shadow King, Cannonball, Warpath, Mirage, Wolfsbane, Karma, Cypher, Sabretooth, Empath, Sebastian Shaw, Donald Pierce, Avalanche, Pyro, Legion, Nimrod, Gateway, Strong Guy, Proteus, Mister Sinister, Marauders, Purifiers, Captain Britain, Sunspot, Forge and Gambit. Claremont scripted many classic stories, including "The Dark Phoenix Saga" and "Days of Future Past", on which he collaborated with John Byrne. He developed the character of Wolverine into a fan favorite. X-Men #1, the 1991 spinoff series premiere that Claremont co-wrote with Jim Lee, remains the best-selling comic book of all time, according to Guinness World Records. In 2015, Claremont and his X-Men collaborator John Byrne were entered into the Will Eisner Award Hall of Fame.