A viral nightmare comes home
On Friday, 25 September 2026, A24's Backrooms began streaming exclusively on HBO Max in the United States — the final stop in one of the most improbable journeys in modern film history. The movie started life as a YouTube analog-horror series made by a teenager, became A24's highest-grossing film ever, and has now landed on the streaming service where most of its audience will finally see it. It aired on HBO's linear channel the following night, Saturday 26 September, at 8:00 p.m. ET.
The official logline is spare, in the best tradition of the concept: "A strange doorway appears in the basement of a furniture showroom, leading to an endless network of interconnected rooms where time bends and the only thing scarier than getting lost is the sense that something is lying in wait."
If you have never heard of the Backrooms, here is the short version. The Backrooms began as a creepypasta — a piece of internet folklore describing what happens when you "noclip" out of reality and end up in an endless maze of empty, yellow-wallpapered office rooms humming with fluorescent light. The concept took off because it named a feeling almost everyone recognises: the strange unease of empty commercial spaces, the architectural uncanny valley of a building that feels wrong. In 2022, a teenage YouTuber named Kane Parsons turned the idea into a found-footage analog-horror series that became a genuine viral phenomenon. A24 hired him to direct the feature adaptation. He was still a teenager when he started; he is 20 now.
The numbers behind the phenomenon
The box-office story of Backrooms is extraordinary by any measure, and genuinely historic for its studio. The film opened theatrically on 29 May 2026 with a domestic opening weekend of around $81 million — a staggering figure for an original horror film with no established franchise behind it. It went on to gross $197.5 million in the United States and Canada, and crossed $367 million worldwide within its first months, officially overtaking every previous A24 release to become the studio's highest-grossing film in history. Later reports in September put the worldwide total past $400 million — all on a production budget reported to be under $10 million.
To put that in perspective: a film made for less than $10 million, directed by a 20-year-old first-time feature filmmaker, outgrossed everything A24 had ever released — a studio whose catalogue includes multiple Oscar winners. The return on investment is the kind of number that gets discussed in business schools.
Critics were largely on board. The film holds an 86% rating on Rotten Tomatoes and a 76 on Metacritic, with reviewers praising its atmosphere and dread. Audiences were more divided — it earned a B-minus CinemaScore, which for a horror film usually signals that the movie withholds the answers and jump scares that mainstream crowds expect. That divisiveness is arguably part of the point: Backrooms is a film about disorientation, and it commits to the feeling.
The cast and the filmmakers
For a film rooted in lo-fi internet horror, Backrooms assembled a strikingly prestigious team. Chiwetel Ejiofor stars as the troubled furniture-store owner who discovers the impossible gateway in his basement; Renate Reinsve plays his therapist. The supporting cast includes Mark Duplass, Finn Bennett, and Lukita Maxwell.
The film was written by Will Soodik and produced by a heavyweight lineup: James Wan, Michael Clear, Roberto Patino, Shawn Levy, Dan Cohen, Dan Levine, Osgood Perkins, Chris Ferguson, Peter Chernin, Jenno Topping, and Kori Adelson. Kane Parsons serves as an executive producer alongside Jesse Savath, Judson Scott, and Chris White. The presence of James Wan and Osgood Perkins — two of the most commercially successful horror filmmakers working today — alongside Shawn Levy signals how seriously the industry took Parsons' vision, even as the film's actual aesthetic stayed close to the eerie, lo-fi textures of the original YouTube series.
How and where to watch it now
For US viewers, HBO Max is now the exclusive streaming home of Backrooms. The film arrived on the service on 25 September 2026 under A24's distribution arrangement with Warner Bros., which sends A24 films to HBO Max after their theatrical windows close. It is not on Netflix, and it is not expected to be — the Warner Bros. deal makes HBO Max the film's streaming home.
Viewers who prefer to own rather than subscribe have had options since 14 July, when the film became available to rent or buy digitally through Apple TV, Amazon, Google Play, YouTube, and Fandango, depending on region. Availability varies by country and by account, so it is worth checking your local HBO Max listing rather than assuming the film is there — streaming rights remain stubbornly territorial even for the biggest hits.
Why Backrooms worked — and what comes next
The success of Backrooms says something real about where horror — and where audiences — are in 2026. The film's power comes from a concept that was already living in millions of people's heads before A24 spent a dollar on it. The Backrooms were a collectively authored nightmare: thousands of fans had expanded the lore through videos, games, wiki entries, and art long before the feature film existed. Parsons did not have to teach the audience what the Backrooms were; he had to deliver a version worthy of what they already imagined.
That is a new kind of intellectual property — one that emerges from the bottom up rather than being developed in a studio. It also explains the film's unusual relationship with its audience. The B-minus CinemaScore suggests that viewers who came in expecting a conventional horror movie found something stranger and more withholding. But the box office suggests that many more viewers came precisely because it was strange. In a year when franchise horror has dominated the charts, an original concept built on pure atmosphere broke through — and it did so without movie stars in the traditional sense, without a nine-figure marketing budget, and without a familiar title.
A24 is not letting the maze go unexplored. Parsons is reported to be returning to direct Backrooms 2, though no production start or release date has been announced. He has also said the original YouTube series will continue, and has discussed the possibility of a television version. For a director who is still 20, that is a remarkable amount of maze left to build — and a reminder that the most interesting careers in film right now may not start in film school at all, but in a bedroom with a camera and an idea the internet cannot stop thinking about.
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