‘Backrooms’ will stream on HBO Max starting Sept. 25, A24’s highest-grossing film sets network premiere for Sept. 26

A24’s horror film “Backrooms” has set a fall streaming rollout date on HBO Max, Deadline reported on Aug. 25. The movie will be available to stream starting Friday, Sept. 25, marking a release window that aligns with the start of the fall television calendar.

Deadline also reported that the film’s linear premiere is scheduled for Saturday, Sept. 26 at 8 p.m. ET. The two-step rollout, first for streaming and then for traditional broadcast, reflects how studios increasingly manage audience access across platforms while preserving schedule visibility for pay-television viewers.

According to Deadline, “Backrooms” is A24’s highest-grossing picture to date, with a reported worldwide gross of $396.5 million. The report characterizes the film as a summer release that expanded beyond initial expectations, citing the scale of its global performance.

The film is directed by Kane Parsons and is based on “internet lore” associated with the “Backrooms” concept, a premise that has circulated online as a recognizable digital creepypasta setting. Deadline did not describe additional plot specifics in its summary, focusing instead on the film’s distribution timetable and commercial results.

HBO Max’s release of “Backrooms” comes as the streamer continues to build seasonal programming around widely discussed genre titles. For viewers, the date announcement clarifies when the movie will become broadly accessible beyond theater schedules, while the following-night linear premiere provides a second viewing option for audiences who watch scheduled television.

For A24, the reported performance and subsequent platform availability underscore the studio’s ability to move major genre properties from theatrical runs into the streaming ecosystem, using distribution windows that extend the movie’s audience reach into the fall. Deadline’s report did not detail whether the streaming release will be part of any special tier or promotion.

No additional details were provided in the report about cast billing beyond noting that the film stars ensemble talent, or about any supplemental releases such as behind-the-scenes features. The announced dates, however, establish a clear next step for consumers and for HBO Max’s fall schedule planning.