Backrooms (2026)
Horror, Mystery, Science Fiction
The Kernel take
Backrooms turned a $10M budget into $387.2M worldwide -- roughly a 39x return, among the widest budget-to-gross multiples in this dataset -- not through traditional P&A spend (no marketing budget is publicly disclosed) but through a viral, internet-native rollout: adapted from a found-footage YouTube creepypasta with a built-in fanbase, it drew over 1.1 billion TikTok views in its first 30 days on just 10,000 uploads (TVREV), and A24 broke from its usual platform-release playbook to open wide in 3,442 domestic theaters -- the biggest opening in the studio's history.
Director track record: Kane Parsons
Backrooms (77) is Kane Parsons' feature directorial debut — there's no prior scored filmography yet to compare it against.
Lead track record: Chiwetel Ejiofor
Backrooms (77) ranks among Chiwetel Ejiofor's best-reviewed roles — more than 15 points above his 61.5-point average across 24 films, trailing only his Oscar-nominated turn in 12 Years a Slave (96).
Box office
Budget $10M · Box office $387.2M
The curve is steeply front-loaded rather than long-legged: Backrooms opened to $81.4M, then fell roughly 68% in weekend two and kept dropping 26-56% most weekends after (down to $0.7M by weekend eight per The Numbers), yet still closed with a reported 2.41x legs multiplier (total domestic vs. opening weekend) -- a viral horror hit that behaved like a conventional front-loaded wide release but sustained just enough of a tail to rack up an outsized total.