A24 just released the trailer for Backrooms and confirmed a May 29, 2026 theatrical release, marking the studio’s biggest push yet to turn an internet-born horror concept into a mainstream event. This adaptation — directed by British YouTuber-turned-filmmaker Kane Parsons and produced with Blumhouse — takes the viral “Backrooms” mythology from found-footage shorts to a full-length A24 thriller.
Per A24’s official announcement and the newly posted trailer on the studio’s YouTube channel, Backrooms follows a therapist who ventures into an otherworldly dimension while searching for a missing patient; the logline promises a descent into an uncanny, maze-like environment ripped from the creepypasta that began circulating online in 2019. The film stars Chiwetel Ejiofor as Clark and Renate Reinsve in the therapist role, joined by Mark Duplass, Finn Bennett, Lukita Maxwell and Avan Jogia.
The creative lineage is clear: the Backrooms idea originated from a 2019 forum post describing endless yellow-tinged rooms and the oppressive hum of fluorescent lights — an image that metastasized across imageboards and YouTube and eventually into Parsons’ found-footage universe. A24’s trailer leans into that texture, favoring long, claustrophobic corridors and the kind of slow-build dread the studio has cultivated in its horror slate.
Parsons’ move from viral shorts to a studio-backed feature is notable. Pairing a digital-native creator with established actors like Ejiofor and Reinsve signals that studios increasingly view internet folklore as bankable IP — a trend that could reshape how horror properties are sourced and financed going forward. (It’s a synthesis of grassroots buzz and traditional star power.)
Reaction on social platforms was immediate. A24 posted the trailer on YouTube and amplified it across X, where early viewers praised the mood and the casting; longtime Backrooms fans pointed out visual nods to Parsons’ original work, while mainstream outlets homed in on Ejiofor and Reinsve’s involvement. The studio’s confirmation of a May 29 release gives theaters a high-profile spring date to market around.
What remains unclear is the film’s post-theatrical plan — will A24 follow its recent pattern of specialty streaming windows, or is a platform partner already in place? Given the Blumhouse co-production credit, expect a traditional theatrical-first rollout, then a streaming deal to follow several months later. Can an idea that started on imageboards translate to wide-audience box-office success? Time — and opening weekend numbers — will tell.
For now, audiences can watch the official trailer on A24’s YouTube channel and mark May 29 on their calendars. The film arrives with a promise of familiar found-footage unease amplified to studio scale; whether it becomes the next breakout A24 horror is the question critics and fans will spend the spring answering.