While Marvel has achieved huge success in recent years by producing its own movies, including Iron Man, Thor and The Avengers, there are still a number of characters who are licensed to other movie studios, including Fox.
The studio currently owns the rights to the X-Men, Wolverine and Fantastic Four franchises, and is currently working on upcoming instalments for all three, namely X-Men: First Class sequel X-Men: Days of Future Past, The Wolverine, directed by James Mangold, and a reboot of Fantastic Four helmed by Josh Trank (Chronicle).
Millar has now been hired to offer his opinion on the creative direction of all of the titles.
The creator of Kick-Ass has written some of the biggest selling Marvel comic books of recent years, including Civil War, Wolverine: Old Man Logan, Ultimate Fantastic Four and The Ultimates.
President of Fox movie production Emma Watts said of the appointment: "In addition to his groundbreaking Marvel work, he is simply one of the most original voices in comics today, and will be an invaluable resource to us and to our filmmakers as we look for fresh opportunities to innovate within our shared Marvel universe."
Millar himself said that he is "proud to be working alongside some of modern cinema's biggest talents", and claimed: "James Mangold is incredible, Matthew Vaughn's one of my closest pals, and Josh Trank gave us, in my opinion, one of the greatest superhero movies of the last decade with Chronicle. The invitation to join this crew was maybe the coolest phone call I've ever had."
He added: "As someone who has spent his entire life obsessed with both comic books and movies, this is essentially my dream gig as it's a unique combination of both."
Millar is also currently working on the Kick-Ass 2 movie, as well as an adaptation of another of his creator-owned series, Supercrooks.
Watch Hugh Jackman discuss The Wolverine with Digital Spy below: