

When Millar was 18, he interviewed writer Grant Morrison, who was doing their first major American work on Animal Man, for a fanzine. He attended Glasgow University to study politics and economics, but dropped out after his father's death left him without the money to pay his living expenses. He initially planned to be a doctor, and subsequently decided that becoming an economist would be a viable alternate plan, but later decided that he "couldn't quite hack it" in that occupation. Although Millar enjoyed drawing comics, he was not permitted to go to art school because his family frowned upon such endeavours as a waste of time for the academic Millar, who studied subjects like chemistry, physics and advanced maths. Millar's mother died of a heart attack at age 64, when Millar was 14, and his father died four years later, aged 65. More recent writers that have impressed him include Jason Aaron and Scott Snyder. Millar has named Alan Moore and Frank Miller as the two biggest influences on his career, characterising them as "my Mum and Dad." Other writers he names as influences include Dave Sim, Grant Morrison, Peter Milligan, Warren Ellis and Garth Ennis. Black and white reprinted comics purchased by his brothers for him would follow, cementing his interest in the medium so much that Millar drew a spider web across his face with indelible marker that his parents were unable to scrub off in time for his First Communion photo a week later. He purchased a Superman comic that day as well.

Still learning to read, Millar's first comic was the seminal The Amazing Spider-Man #121 (1973), which featured the death of Gwen Stacy. His brother Bobby, who as of 2010 worked at a special needs school, introduced him to comics at age 4 while attending university by taking him to shops and purchasing them for him. He has four older brothers, and one older sister, who are 22, 20, 18, 16 and 14 years older than Millar, respectively. His parents were also born in Coatbridge, and Millar spent the first half of his life in the town's Townhead area, attending St Ambrose High. Millar was born 24 December 1969 in Coatbridge, Scotland. In 2017, Netflix bought Millar's comic line, Millarworld, which Millar and his wife Lucy would continue to run, publishing new comics and adapting them for other media. Millar has been an executive producer on all of his films, and for four years worked as a creative consultant to Fox Studios on their Marvel slate of films. The former inspired the 2016 Marvel Studios film Captain America: Civil War, while the latter was the inspiration for the 2017 20th Century Fox film Logan. Millar wrote Civil War and " Wolverine: Old Man Logan", two of Marvel's biggest-selling storylines. At Marvel Comics he created The Ultimates, selected by Time magazine as the comic book of the decade, and described by screenwriter Zak Penn as a major inspiration for 2012's The Avengers movie.

His DC Comics work includes Superman: Red Son. Mark Millar MBE ( / ˈ m ɪ l ər/ born 24 December 1969) is a Scottish comic book writer, known for his work on The Authority, Swamp Thing, the Ultimates, Marvel Knights Spider-Man, Ultimate Fantastic Four, Civil War, Kingsman: The Secret Service, Wanted, Chrononauts, Superior and Kick-Ass, the latter seven of which have been, or are planned to be, adapted into feature films.
