Backrooms Movie: A24's Most Anticipated Horror of 2026 Is About to Hit Theaters — What We Know

From Viral YouTube Lore to the Big Screen — A24's Backrooms Is Finally Here

If you've spent enough time down the internet rabbit hole, you've probably stumbled into the Backrooms. What started as a creepy creepypasta and evolved into a viral YouTube series by creator Kane Parsons is now becoming a full-blown theatrical event. A24's Backrooms hits cinemas on May 29, 2026, and it's shaping up to be one of the most unique horror releases of the year.

This isn't just another internet-to-Hollywood cash grab. Kane Parsons — who becomes A24's youngest-ever feature director — is personally helming the adaptation, and he's made it clear that this film stays true to the eerie, liminal-space aesthetic that made his web series so unsettling.

Meet the Cast and the Creators Behind This Nightmare

The film stars Chiwetel Ejiofor (Oscar-nominated for 12 Years a Slave) as Clark, a character who finds himself trapped in the seemingly endless maze of yellow-lit corridors. Joining him is Renate Reinsve, who broke out in Joachim Trier's The Worst Person in the World and A Different Man. It's a cast that brings serious dramatic weight to what could have easily been a gimmicky horror project.

Behind the scenes, A24 partnered with Chernin Entertainment, 21 Laps Entertainment (Shawn Levy's production house behind Stranger Things), and James Wan's Atomic Monster — yes, that James Wan, the mind behind The Conjuring and Insidious. That's a horror pedigree you don't ignore.

Parsons also built a 30,000-square-foot practical set to recreate the claustrophobic, fluorescent-lit hallways of the Backrooms. No cheap green screen work here — this is a physical nightmare you can touch, and early reactions from critics have praised the film for its tactile, immersive atmosphere.

Box Office Projections and Why Critics Are Already Buzzing

Deadline reports that Backrooms is tracking for roughly a $20 million opening weekend — not bad for an original horror film with no franchise baggage. In a summer dominated by superhero sequels and animated reboots, an original A24 horror flick could easily surprise everyone.

Early critical reactions have been overwhelmingly positive, with reviewers calling the film "unique," "original," and one of the most genuinely terrifying theatrical experiences of 2026. Parsons has also promised that the movie will be in "strict continuity" with his viral YouTube series, meaning fans of the web series won't feel like they're watching a different universe.

What makes Backrooms even more interesting is its refusal to hand audiences neat answers. In an era where every horror movie explains its monster in the third act, Parsons is leaning into ambiguity — the kind of existential dread that made the original Backrooms concept so unsettling in the first place.

If you're looking for a horror movie that actually feels fresh in 2026, Backrooms might just be the one. Mark your calendars for May 29.

Backrooms opens in theaters worldwide on May 29, 2026, distributed by A24.