A24's 'Backrooms' Is Now Streaming on HBO Max — And It's Already Crushing Records

Kane Parsons' Internet Horror Phenomenon Has Found Its Streaming Home

If you haven't heard about Backrooms yet, where have you been? The A24 horror film from 20-year-old filmmaker Kane Parsons — yes, the same guy who turned creepy YouTube videos about endless fluorescent-lit hallways into a full-blown cultural phenomenon — is now streaming exclusively on HBO Max as of September 25, 2026.

And it's already breaking streaming records. According to early numbers, Backrooms pulled in the biggest debut weekend for any A24 title on the platform, surpassing even Everything Everywhere All at Once and Hereditary. For a movie that started as a found-footage internet experiment, that's absolutely wild.

From YouTube to Box Office Domination

Here's the thing about Backrooms that makes it so fascinating: Kane Parsons was literally a teenager making VFX videos on YouTube when the concept went viral. The idea — endless liminal spaces filled with buzzing fluorescent lights and an overwhelming sense of wrongness — struck a nerve with internet culture in a way nobody predicted.

When A24 picked up the project, expectations were modest. A $15 million budget, an unknown director, no major stars. But the film exploded at the box office, becoming A24's highest-grossing movie ever with over $400 million worldwide. Critics compared it to Blair Witch Project for a new generation, though Parsons' technical filmmaking chops put him leagues ahead.

The movie stars relative newcomers alongside established character actors, and Parsons wisely kept the cast small to focus on atmosphere. The result is 97 minutes of pure, escalating dread that's unlike anything else in modern horror.

Why Millennials Are Losing Their Minds Over It

Part of what makes Backrooms land so hard is its connection to internet culture. If you've ever scrolled through liminal space photos at 2 AM, felt that inexplicable unease at an empty mall, or remember the original Backrooms creepypasta — this movie was made for you. Parsons didn't just adapt the concept; he understood it on a cellular level.

The HBO Max release also includes behind-the-scenes features showing how Parsons achieved the film's distinctive look using a mix of practical sets and Unreal Engine 5 virtual production. It's a masterclass in indie filmmaking meeting next-gen technology.

Other September arrivals on HBO Max include Aaron Taylor-Johnson and Theo James' action thriller Fuze, but let's be real — Backrooms is the main event. If you haven't watched it yet, clear your evening. Just maybe leave the lights on.