Ultimate X-Men is a superhero comic book series that was published by Marvel Comics from 2001 to 2009. The series is a modernized re-imagining of Marvel's long-running X-Men comic book franchise as part of its Ultimate Marvel imprint. The Ultimate X-Men exist alongside other revamped Marvel characters in Ultimate Marvel titles including Ultimate Spider-Man, Ultimate Fantastic Four, and The Ultimates.
The protagonists are the X-Men, a group of mutants whose unusual genetics grant them superpowers which set them apart from the rest of humanity. They are led by Professor Charles Xavier, the world's most powerful telepath. The series features many characters and storylines similar to those of the original X-Men series. Ultimate X-Men almost completely ignores supernatural or mystical elements as plot devices, and the X-Men have no secret identities, and mutants are mistrusted and hunted down. The series began in 2001 under writer Mark Millar and artists Adam Kubert and Andy Kubert, whilst the final issues of the series were written by Aron Coleite and penciled by Mark Brooks.
A quasi-sequel/spinoff titled Ultimate Comics: X began in February 2010, but only lasted for 5 issues. The series focused on Wolverine's secret son Jimmy Hudson, Jean Grey, and several other mutants dealing with the aftermath of Ultimatum.
Ultimate X-Men was then relaunched by Nick Spencer and Paco Medina, with the title now called Ultimate Comics: X-Men.