Caitlin FitzGerald

Caitlin FitzGerald is an American actress and filmmaker. She is known for her roles as Libby Masters in the Showtime drama “Masters of Sex” (2013–2016) and Simone in Starz series “Sweetbitter” (2018–2019). In 2025, she starred as Penny Sinclair in the Prime Video series “We Were Liars.” She has played recurring roles on series including “Succession,” “Inventing Anna,” and “Gossip Girl.” Film appearances include The Trial of the Chicago 7, Adult Beginners, and It’s Complicated. She starred as Elizabeth Proctor in the 2023 West End production of The Crucible, and will play Desdemona in the 2025 West End revival of Othello.