Backrooms Heads to HBO Max — A24's Highest-Grossing Movie Ever Gets a Streaming Date

The Internet Horror Phenomenon Comes Home

If you thought the Backrooms creepypasta couldn't get scarier, the movie adaptation is about to prove you very wrong. Backrooms, A24's breakout horror hit, is officially heading to HBO Max — and it's a big deal.

Not only is it one of the year's critical darlings, but it's now A24's highest-grossing movie of all time. That's a massive flex for a studio known for prestige over profit — and proof that internet-native horror can fill actual theaters.

Meet the Cast

• Chiwetel Ejiofor as Clark, a furniture store owner who gets lost in the endless yellow corridors
• Renate Reinsve — the Worst Person in the World breakout who adds real emotion to the dread
• A story spawned from a viral 2019 internet image that became a full-blown pop-culture mythology

Why Everyone's Talking

The Backrooms franchise started as a simple, unsettling photo of a yellowish office maze with a caption: "If you're not careful and you noclipped out of reality, you might end up in the Backrooms." What followed was a sprawling internet horror universe with levels, entities, and a fanbase that took it dead seriously.

The movie turns that lore into a proper cinematic nightmare — claustrophobic, atmospheric, and genuinely tense. It's the rare internet-to-screen adaptation that actually understands its source material, leaning into the liminal-space dread instead of explaining it away.

What the Critics Say

The film received widespread critical acclaim during its theatrical run, with praise focused on its sound design, its commitment to the uncanny, and Ejiofor's grounded performance at the center of the chaos. For a genre that usually burns out fast, Backrooms has staying power.

When to Watch

After a phenomenal theatrical run, Backrooms lands on HBO Max this September. Whether you're new to the mythos or a long-time fan of the level-mapping subreddits, this is the definitive way to experience it this fall.

For anyone who discovered the Backrooms through YouTube documentaries or the countless fan-made levels, the film also works as a perfect entry point — you don't need to know what "level 0" means to feel the dread. And for the lore-heads, there are plenty of Easter eggs tucked into the set design that are already getting dissected frame by frame online.

Bottom line: Dim the lights, turn up the volume, and watch out for any yellow wallpaper. You don't want to noclip into this one alone.