Kane Parson’s Backrooms is making another piece of A24 history. The feature is expected to pass the $100 million mark domestically on Wednesday, after officially becoming A24’s highest grossing film of all time in North America Tuesday with a cume of $97.7 million. 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 up 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, …