Sydney Sweeney reprises her role as Cassie Howard, Lexi's older sister. Cassie has a strained relationship with her dad after his breakup with her mom and struggles with her own romantic relationships. She wound up pregnant in season one of the show, but the trailer for season two shows a crying Cassie scream at her friends that she's happier than ever. Sweeney's appeared in a number of TV shows, including The White Lotus, The Handmaid's Tale, and Sharp Objects.