The $10 million movie takes the crown from the Timothée Chalamet starrer Marty Supreme, which brought in $96 million domestically and was the studio’s most expensive movie.

The achievement comes just days after Backrooms notched A24’s biggest opening weekend ever at $81.4 million and made Parsons, 20, the youngest filmmaker ever to top the domestic box office.

The film has not slowed down and has been big during the week, collecting $7.6 million on Monday and $8.6 million on Tuesday.

Parsons began Backrooms as a series of popular YouTube Shorts and maintains the rights to the IP. After building a massive online following, the movie has hit a nerve with Gen Z, with half of the opening weekend audience under 25 and 75 percent under 35.

Backrooms‘ producers include Chernin Entertainment, which co-financed it, Blumhouse-Atomic Monster and 21 Laps. It stars Chiwetel Ejiofor as a failed architect who stumbles across an endless series of rooms in the furniture store he manages and Renate Reinsve as his therapist.

Parsons’ rise comes just two weeks after fellow YouTuber Curry Barker surprised Hollywood with Obsession, which has become a breakout hit and was the first movie since 1982’s E.T.: The Extra Terrestrial to have its second and third weekends increase rather than fall as most movies do.

All eyes will be on both Backrooms and Obsession this weekend as Gen X property Masters of the Universe and a revival of 2000s favorite Scary Movie hit theaters.