Grant Morrison MBE (born 31 January 1960) is a Scottish comic book writer, screenwriter, and producer. Their work is known for its nonlinear narratives, humanist philosophy and countercultural leanings. Morrison has written extensively for the American comic book publisher DC Comics, penning lengthy runs on Animal Man, Doom Patrol, JLA, Action Comics, and Green Lantern as well as the graphic novels Arkham Asylum, JLA: Earth 2, and Wonder Woman: Earth One, the meta-series Seven Soldiers and The Multiversity, the mini-series DC One Million and Final Crisis, both of which served as centrepieces for the eponymous company-wide crossover storylines, and the maxi-series All-Star Superman. Morrison's best known DC work is the seven-year Batman storyline which started in the Batman ongoing series and continued through Final Crisis, Batman and Robin, Batman: The Return of Bruce Wayne and two volumes of Batman Incorporated. They also co-created the DC character Damian Wayne.

Morrison's creator-owned work, the bulk of which was published through DC Comics' Vertigo imprint, includes Flex Mentallo and We3 with Scottish artist Frank Quitely, Seaguy with artist Cameron Stewart, The Filth with Chris Weston, and the three-volume series The Invisibles. At Marvel, Morrison wrote a three-year run on New X-Men and created Marvel Boy for the publisher's Marvel Knights imprint.

Between 2016 and 2018, Morrison served as the editor-in-chief of the Heavy Metal magazine.

Morrison's work has drawn critical acclaim. They have won numerous awards, including Eisner, Harvey, and Inkpot awards. In 2012, Morrison was appointed Member of the Order of the British Empire (MBE) for services to film and literature.

Grant Morrison was born in Glasgow, Scotland, in 1960. They were educated at Allan Glen's School where their first portfolio of art was rejected by their careers guidance teacher, who encouraged them to work in a bank. Their first published works were Gideon Stargrave strips for Near Myths in 1978 (when they were about 17), one of the first British alternative comics. Their work appeared in four of the five issues of Near Myths and they were suitably encouraged to find more comic work. This included a weekly comic strip, Captain Clyde, an unemployed superhero based in Glasgow, for The Govan Press, a local newspaper, plus various issues of DC Thomson's Starblazer, the science fiction counterpart to that company's Commando title.

Morrison spent much of the early 1980s touring and recording with their band The Mixers, occasionally writing Starblazer for D.C. Thomson and contributing to various UK indie titles. In 1982, Morrison submitted a proposal involving the Justice League of America and Jack Kirby's New Gods entitled Second Coming to DC Comics, but it was not commissioned. After writing The Liberators for Dez Skinn's Warrior in 1985, Morrison started work for Marvel UK the following year. There they wrote comic strips for Doctor Who Magazine, the final one a collaboration with a then-teenage Bryan Hitch, as well as a run on the Zoids strip in Spider-Man and Zoids. 1986 also saw publication of Morrison's first of several two- or three-page Future Shocks for 2000 AD.

Morrison's first continuing serial began in 2000 AD in 1987, when they and Steve Yeowell created Zenith.

Morrison's work on Zenith brought them to the attention of DC Comics, who asked Morrison to work for them. They accepted Morrison's proposals for Animal Man, a little-known character from DC's past whose most notable recent appearance was a cameo in the Crisis on Infinite Earths limited series, and for a 48-page Batman one-shot that would eventually become Arkham Asylum: A Serious House on Serious Earth.