A24’s Backrooms Trailer Has Arrived — And The Internet’s Greatest Horror Just Got Very Real
Now A24 is bringing it to a cinema near you. And the trailer suggests they have done the impossible — taken one of the internet’s most viscerally terrifying concepts and made it even worse.
Backrooms hits theatres on May 29, 2026. Directed by Kane Parsons — the 20-year-old filmmaker whose viral YouTube found footage series created the phenomenon in the first place — this is one of the most extraordinary stories in modern horror. A teenager builds a mythology from a single creepypasta image of a yellowed empty office. It amasses nearly 100 million views. A24 comes calling. James Wan produces. And now, less than four years later, that teenager is directing a studio horror film starring two Oscar nominees.
The internet did something real. And real is infinitely more terrifying than anything that lives online.
What follows is a suffocating descent into the Backrooms themselves — endless yellow-walled corridors stretching in every direction, moist carpet underfoot, harsh buzzing overhead lights illuminating nothing but more corridor, more doorway, more wrong. The architecture does not obey any logic a human mind was built to process. Rooms expand. Passages multiply. The geometry is quietly, insistently, catastrophically incorrect.
Renate Reinsve plays Dr Mary Kline — the therapist who, after Clark vanishes into the dimension beyond the doorway, is forced to go in after him. Her character’s arc drives the film’s narrative — a woman of science and reason confronting something that makes both entirely meaningless. Reinsve brings the kind of grounded emotional intelligence that makes the supernatural feel genuinely threatening rather than simply spectacular.
The Backrooms has always understood that the worst horror is the horror you cannot quite see. A24 — the studio that gave us Hereditary, Midsommar and Talk to Me — is exactly the right home for material that demands that kind of restraint.
What makes this film genuinely significant beyond its horror credentials is the story of how it came to exist at all. Kane Parsons began uploading his Backrooms series in January 2022 as a teenager with a camera and a vision. The found footage aesthetic, the practical effects, the understanding of how to build dread through architecture and sound rather than gore — all of it was there from the very first upload. A24 recognised something real and moved fast. The result is one of the most significant digital-to-theatrical transitions in the history of the genre.
Mark Duplass, Finn Bennett, Lukita Maxwell and Avan Jogia round out a cast assembled with clear intention — a blend of indie credibility, dramatic weight and raw talent that fits A24’s signature approach perfectly.
The fluorescent lights are on. The corridor stretches ahead. Something is behind you.
Do not look back. Do not stop walking. Do not go through the door.
