He is best known as the creator of Netflix's 2022 live-action comedy horror series Wednesday, the Tim Burton helmed Addams Family spin-off.
He also co-wrote other feature films like Tom Dey's Shanghai Noon and its sequel Shanghai Knights, Sam Raimi's Spider-Man 2 and Rob Cohen's blockbuster action-adventure film The Mummy: Tomb of the Dragon Emperor, as well as Tim Burton's Beetlejuice Beetlejuice, the sequel to the iconic 1988 movie.
He attended The Peter Stark Producing Program at the University of Southern California where he teamed up with his writing/producing partner, Alfred Gough.
The films Millar and Gough have written or produced have a combined global box office in excess of one billion dollars.
Millar and Gough also produced Hannah Montana: The Movie, which was based on the Disney Channel smash hit teen sitcom TV series of the same name starring Miley Cyrus.
Millar and Gough left the series in 2008, after seven seasons, breaking the news of their departure with an open letter posted to a Smallville fan site.
[6] The lawsuit was finally settled in May 2013, mere weeks before a scheduled June trial; the terms of the settlement were not made known to the public.
[6][7] In 2015, Millar and Gough began creating and producing the epic fantasy television series The Shannara Chronicles for MTV.
The martial arts drama was set in a gun free post apocalyptic America where warring barons had personal armies of lethally trained fighters.
The series was created by Millar and Gough, but Tim Burton teamed with the duo as an executive producer and directed the first four episodes.
A promo featuring Thing delivering scripts and announcing the new cast was directed by Millar, as well as returning cast, Jenna Ortega, Emma Myers, Catherine Zeta-Jones, Luis Guzman, Hunter Doohan, Georgie Farmer, new additions include Steve Buscemi, Joanna Lumley, Thandiwe Newton, Heather Matarazzo, and Evie Templeton.
Millar and Gough also produced the unsold live-action pilot, Aquaman (which initially premiered on July 25, 2006 on iTunes), which was based on the DC Comics character of the same name, and it has been run as a standalone episode.