Sydney Sweeney is blowing audiences away with her portrayal of Cassie Howard in season 2 of HBO's Euphoria. Despite Zendaya's Rue technically being the main character of the show, Cassie-content is dominating social media, and for good reason. Her storyline this season is nail-baiting stuff; from her affair with Nate Jacobs (Jacob Elordi) — her best friend's ex — to her near-constant mental breakdowns, Cassie has a lot going on. And Sweeney is fantastic at letting us know.