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Backrooms horror film debuts on HBO Max after record box office
The A24 horror film ‘Backrooms’, directed by 20-year-old Kane Parsons, has debuted on the streaming platform HBO Max as of September 25, 2026. The film, which originated from Parsons’ viral YouTube series about liminal spaces, has become a major cinematic phenomenon.
With a production budget of approximately $10 million, ‘Backrooms’ has grossed over $400 million worldwide, making it the highest-grossing release in A24’s history. The film’s domestic opening reached $81 million, surpassing previous studio records.
Starring Chiwetel Ejiofor, Renate Reinsve, and Mark Duplass, the story follows a journey into an endless network of interconnected rooms. Following its theatrical run, the film is now available to HBO Max subscribers, with a linear debut scheduled for HBO on September 26.