Kevin O'Neill ((1953-08-22)22 August 1953 – 3 November 2022)[3][4] was an English comic book illustrator who was the co-creator of Nemesis the Warlock, Marshal Law (both with writer Pat Mills), and The League of Extraordinary Gentlemen (with Alan Moore).

[5] O'Neill began working for the publishing company IPC at the age of 16 as an office boy for Buster, which was a children's humour title.

Mills and O'Neill's next major work was a one-off story called Terror Tube in issue 167 which was said to be inspired by the song Going Underground by The Jam.

The strip would eventually rival Judge Dredd in terms of popularity but O'Neill's art would get him into trouble with IPC's censors who considered his work too violent and disturbing.

However O'Neill was one of 2000AD's most popular artists and would not only continue working on Nemesis the Warlock, but would provide art for The ABC Warriors and even Judge Dredd.

(created with Steve MacManus for Judge Dredd Annual 1981) was involved in controversy when it was realised that it was the basis of Richard Stanley's 1990 film Hardware.

When DC asked what was wrong and if anything could be changed (the story featured scenes of a crucifixion) to get approval, the Authority replied that it was O'Neill's entire style they found objectionable.

Mills and O'Neill created a six issue mini-series for Epic Comics called Marshal Law which would be their take on superheroes.

[citation needed] In 1999 O'Neill teamed up with Alan Moore for a six issue series for America's Best Comics called The League of Extraordinary Gentlemen.

After a legal dispute where it was alleged the film was plagiarised by 20th Century Fox and that Fox solicited the idea for Moore and O'Neill's comic as a smokescreen, the pair have taken the third volume of League of Extraordinary Gentlemen and its Nemo spinoffs to Knockabout Comics and Top Shelf Productions[10][11] due both to Moore feeling insulted by the lack of support from 20th Century Fox and DC comics in the lawsuit, and also Warner Bros.' failure to retract false claims of Moore's endorsement of the V for Vendetta film adaptation.

O'Neill talks about League of Extraordinary Gentlemen: Century, his run-ins with the censors and the status of the Marshal Law movie in an interview with The Times.

In a March 2021 podcast O'Neill revealed that he had completed eight pages of comics for Alan Moore's Moon and Serpent Bumper Book of Magic for Top Shelf, as well as a cover illustration and design work for the Cinema Purgatorio collected edition.