Edebiri and Sennott star as Josie and PJ, and "Willow" series star Ruby Cruz plays their friend Hazel. Gerber stars as Brittany and Liu plays Isabel. The cast also includes Nicholas Galitzine, who also stars in this August's "Red, White & Royal Blue," and Lynch, who's making his feature debut. Dagmara Dominczyk, Miles Fowler, Lacey Dover, Summer Joy Campbell, and Alyssa Matthews round out the sprawling ensemble.