The League of Extraordinary Gentlemen (LoEG) is a multi-genre, cross-over comic book series co-created by writer Alan Moore and artist Kevin O'Neill which began in 1999.

After leaving the America's Best imprint, the series moved to Top Shelf and Knockabout Comics, which published Volume III: Century (released as three graphic novellas), the Nemo Trilogy (a spin-off of three graphic novellas centered on the character of Nemo), and Volume IV: The Tempest (originally released as a six-issue limited series).

Elements of Volume I were used in a loosely adapted feature film of the same name, released in 2003 and starring Sean Connery in his last live-action role.

The year is 1898, and Mina Murray is recruited by Campion Bond on behalf of British Intelligence and asked to assemble a league of other extraordinary individuals to protect the interests of the Empire: Captain Nemo, Allan Quatermain, Dr. Jekyll, and Hawley Griffin the Invisible Man.

Following this, Mina and Allan team up with fellow immortal Orlando and are shown in an adventure which spans a century, from 1910 to 2009, concerning a plot by evil magicians to create a Moonchild that might well turn out to be the Antichrist.

In a 1997 interview with Andy Diggle for the now defunct Comics World website, Alan Moore gave the title of the work as "The League of Extraordinary Gentlefolk".

This has lent the series considerable popularity with fans of esoteric Victoriana, who have delighted in attempting to place every character who makes an appearance.

The entire initial print run was destroyed and reprinted because the publisher felt that this could be perceived as an attack on Marvel Comics, DC's main competition.

[3] After several additional complaints over DC interference, Moore decided to wind up his ABC projects, intending to only continue with League (the only title he, with O'Neill, actually owned).

Moore requested that someone involved with the film's production company—and DC Comics parent company, Warner Bros.—officially retract the comments and apologize.

He also claims that his lack of support from DC regarding a minor lawsuit related to the film adaptation of The League of Extraordinary Gentlemen was instrumental in his departure.

[9] The comic The Chimera Brigade by science-fiction writer Serge Lehman has been regarded by critics as the French reply to The League.

Jess Nevins has produced a series of annotations for each volume which are available online and have also been expanded into book form: The League of Extraordinary Gentlemen appear in a self-titled film, consisting of Allan Quatermain, Captain Nemo, Mina Harker, an original Invisible Man named Rodney Skinner, Dr. Jekyll and Edward Hyde, Dorian Gray, and Tom Sawyer.