Mark Duplass Among Cast Revealed for A24’s Adaptation ‘The Backrooms’

Mark Duplass

July 11, 2025

Written by Kelli Marchman McNeely

Kelli Marchman McNeely is the owner of HorrorFuel.com. She is an Executive Producer of "13 Slays Till Christmas" which is out on Digital and DVD and now streaming on Tubi. She has several other films in the works. Kelli is an animal lover and a true horror addict since the age of 9 when she saw Friday the 13th. Email: horrorfuelinfo@gmail.com

The highly anticipated sci-fi horror film The Backrooms is expanding its impressive cast! Today, we’ve got an update. The movie will star Mark Duplass (Creep), Finn Bennett (True Detective), Lukita Maxwell (Shrinking), and Avan Jogia (56 Days). They’ll be starring alongside the previously announced Chiwetel Ejiofor and Renate Reinsve.

Production Begins on Viral Horror Sensation

Production on The Backrooms is officially underway in Canada this week! The film is a collaborative effort between A24, Atomic Monster, The North Road Company’s Chernin Entertainment, and 21 Laps Entertainment, with Chernin Entertainment co-financing alongside A24. Both A24 and Chernin Entertainment are serving as co-studios. The screenplay was penned by Will Soodik, and Wittney Horton handled casting.

From YouTube Phenomenon to A24 Feature

While specific plot details are being kept under wraps, we do know that The Backrooms is inspired by Kane Parsons’ viral YouTube horror universe. Parsons’ anthological series first debuted in 2022 and has since racked up over 190 million views – a massive online sensation! At just 20 years old, Parsons is making his feature directorial debut with this film, making him the youngest filmmaker ever to collaborate with A24.

Parsons’ The Backrooms centers on a camera operator who falls over while shooting a film. He slips through a crack in reality and wakes up in an abandoned building on another plane. There’s a horrible dial-up sound, a creepy message telling him to stay still, and long corridors that cast dark shadows. He’s stuck in a maze of hallways with no way out.

The film boasts a strong producing team, including Shawn Levy, Dan Cohen, and Dan Levine for 21 Laps Entertainment, along with Chris Ferguson for Oddfellows Pictures and Roberto Patino. From Atomic Monster, James Wan and Michael Clear are producing, with Judson Scott as executive producer and Alayna Glasthal overseeing. Chris White, who brought the project to Atomic Monster, will also serve as executive producer.

With a blend of established talent and a fresh, viral creative force, The Backrooms is shaping up to be one of the most intriguing horror projects on the horizon!

 

 

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