'Backrooms' Sets A24's Best-Ever Opening as a Viral YouTube Series Goes Theatrical

A horror film built from a four-year-old internet myth has just given A24 the biggest opening weekend in the studio’s history. Backrooms, the feature directorial debut of 20-year-old Kane Parsons, earned $38 million domestically on Friday from 3,442 theaters and is projected to gross between $85 million and $90 million across the three-day weekend, according to figures reported by Variety, Deadline, and The Hollywood Reporter. That total more than triples A24’s previous opening-weekend record — Alex Garland’s Civil War, which debuted to $25.5 million in 2024.

The number is striking on its own. What makes it a culture story rather than a box office footnote is where the movie came from. Backrooms is adapted from a YouTube series Parsons started uploading in January 2022, when he was 16 years old. The original short, “The Backrooms (Found Footage),” was animated in Blender and run through a VHS filter to disguise its CGI; the series has since drawn roughly 79 million views and is widely credited with reviving mainstream interest in the “liminal space” aesthetic that spread across the internet in the early 2020s. A teenager’s free YouTube uploads have now become the most commercially successful film a major American indie studio has ever opened.

From a 4chan thread to the top of the box office

The Backrooms began not as a film concept but as an internet legend. The idea traces to an image posted to 4chan in 2019 — a photograph of an empty, yellow-walled office interior, paired with text warning that if you “noclip out of reality in the wrong areas,” you would fall into an endless maze of those rooms. The post became a foundational piece of “creepypasta,” the genre of collaboratively built online horror folklore.

Parsons, posting under the handle Kane Pixels, took that static premise and gave it motion. His found-footage series imagined characters exploring the rooms while something unseen pursued them, and the technical polish — convincing camera movement, realistic lighting, the deliberate degradation of the VHS look — drew an audience far larger than typical amateur horror animation. The series, covered in detail by the original web project’s documentation, turned an anonymous forum image into a recognizable piece of internet culture.

A24 acquired the feature rights and co-financed the film with Chernin Entertainment for under $10 million, with James Wan’s Atomic Monster and Shawn Levy’s 21 Laps among the production partners. The finished film keeps the premise but reworks it for theaters: Clark, a small-town furniture store owner played by Chiwetel Ejiofor, discovers a portal to the endless dimension in the basement of his showroom. Renate Reinsve, Mark Duplass, Finn Bennett, and Lukita Maxwell round out the cast. Critics responded — the film holds a 90 percent positive rating on Rotten Tomatoes from more than 170 reviews — and audiences turned out in numbers no one in the industry projected when the project was announced.

Why a $10 million horror movie matters this much

The financial math is the part Hollywood will study. A sub-$10 million production that opens to $85 million or more is, in pure return terms, one of the most profitable wide releases of the year — a category that has more often belonged to studios like Blumhouse than to A24, whose brand was built on prestige dramas and mid-budget genre swings rather than franchise-scale openings.

But the more consequential signal is about where the audience came from. Backrooms did not arrive with the marketing apparatus of a legacy sequel or a comic-book tentpole. It arrived with a built-in audience that had already spent years inside the world on YouTube, TikTok, and Discord. That is a different acquisition path than the one that powered this spring’s other box office surprises. When The Devil Wears Prada 2 outgrossed its 2006 original in ten days, it did so by reactivating a millennial audience’s nostalgia for a 20-year-old film. Backrooms did the opposite: it converted an audience that has never known a pre-internet pop culture into theatrical ticket buyers for the first time.

That distinction matters because studios have spent the past several years trying, and frequently failing, to translate online phenomena into theatrical revenue. The “creator-to-cinema pipeline” has produced as many misfires as hits, and the assumption that a large online following guarantees a box office turnout has been repeatedly disproven. Backrooms is a data point on the other side of that ledger — but a specific one, with a specific lesson attached.

What the opening does and doesn’t prove

The temptation inside the industry will be to read this as a green light for adapting whatever has trended online. The film itself complicates that reading. Backrooms worked in part because Parsons, the person who built the online phenomenon, also directed the film. The creative authorship never left the property. That continuity — the originator carrying the work from YouTube to the multiplex rather than handing it to a studio team — is closer to what happened with the Prada sequel, where the original director and cast returned to execute a single vision, than to the typical IP acquisition where a viral asset is bought and reverse-engineered into a movie by people who had nothing to do with its creation.

The opening also lands at a moment when the relationship between technology platforms and Hollywood is unusually fraught. Studios have been retreating from some of the experimental partnerships they chased a year ago, including Disney’s now-scrapped deal to license its characters to OpenAI’s Sora, and the major studios sat out this month’s Cannes Film Festival in a notable absence from the prestige circuit. Against that backdrop, a film whose entire creative DNA was forged on free internet platforms — and whose director is younger than some of the studio executives’ assistants — reads as a counter-current. The pipeline that produced Backrooms ran through YouTube and 4chan, not a development executive’s slate.

Where the weekend leaves the summer

Backrooms took the No. 1 spot from Disney and Lucasfilm’s Star Wars: The Mandalorian and Grogu, which fell roughly 69 percent in its second weekend to around $25 million after opening to the lowest debut of any theatrical Star Wars film. The contrast is sharp: a $200 million-tier franchise built on one of the most valuable IPs in entertainment slid hard in week two, while a sub-$10 million horror film built from a forum post opened to more than three times its own studio’s prior best.

That juxtaposition is the part worth holding onto as summer 2026 unfolds. The season’s box office has been defined less by the size of the IP behind a film than by whether the film arrives with an audience that already feels ownership over the material — whether that audience is millennial women who grew up on The Devil Wears Prada or Gen Z viewers who grew up watching the Backrooms expand on YouTube. The studios chasing the next $200 million sequel will note that the biggest opening A24 has ever recorded cost less than 5 percent of that, and that it was directed by someone who built its audience for free, one upload at a time, starting at 16.

Whether Backrooms holds — horror films are notorious for steep second-weekend drops — will be clear by next Sunday. But the record it set on opening weekend is already fixed, and the lesson it carries for an industry still trying to decode the internet is unusually legible: the audience was real before the movie existed, and the person who created that audience was the one who made the film.