Director Kane Parsons’ horror thriller "Backrooms" opened with an estimated $81 million over the weekend against a $10 million production budget, an amount more than enough to justify the production of at least one sequel.

“Backrooms,” director Kane Parsons’ horror thriller based on his hit YouTube web series, is new in theaters this weekend and is winning over most Rotten Tomatoes critics.

'Backrooms' has made $10.4 million at the box office Thursday previews, a record for A24