Sophie Bathsheba Thatcher is an American actress. She is best known for starring in Showtime's psychological drama series Yellowjackets (2021-present), and for her appearance in The Book of Boba Fett (2022). In 2018, she made her big screen debut in the American science fiction film Prospect. Thatcher's work on stage includes productions of Oliver!, Seussical, The Diary of Anne Frank, and The Secret Garden.