Has written numerous other comic book titles including Sovereign Seven, Gen13, Iron Fist and Ms. Marvel.
Recently returned to Marvel and is currently writing XTreme X-Men for the company.
Was the longtime writer of the Marvel Comics series Uncanny X-Men, writing the title from 1975 until 1991. The series inspired the 2000 film X-Men.
Created (or co-created) the X-Men characters Dazzler, Longshot, Rogue, Mystique, Mojo, Destiny, Pyro, Avalanche, Kitty Pryde, Sebastian Shaw, Phoenix and Legion, among others. Claremont was also key in re-engineering the histories of most of the other major X-Men characters, most notably Wolverine, whom he and artist Frank Miller recast as a man of honor (a quasi-samurai) instead of a beserker, and Magneto (by introducing the backstory that the young Magneto was a Holocaust survivor.)
September 2004 - Was suppose to attended the Armaggeddon Pulp Culture Expo Convention in Wellington, New Zealand as a special comic book writer guest but pulled out due to schedule conflicts
His graphic novel "God Loves, Man Kills" was used as a loose basis for the film X2. Common story elements include: The character William Stryker, kidnapping Professor Xavier, using him to fuel a machine that would destroy mutants, and the X-Men allying themselves with Magneto to defeat him. In the comics, this story line happened after the "death" of Jean Grey and her resurrection as the Phoenix. In the film, her death happens at the end of the story.
Grew up in Long Island, New York since the age of three.
Three of the stories he created for the X-Men comic book have also been adapted for the film series: "God Loves, Man Kills," which became X-Men 2 (2003); "The Dark Phoenix Saga," elements of which were used for both X2 and X-Men: The Last Stand (2006), and X-Men: Days of Future Past (2014), based on his story of the same name. The latter two stories were also both adapted for the X-Men animated series.