Sarah Grace Stiles is an American actress and singer known for her work in Off-Broadway and Broadway theatre. She portrays Bonnie Barella in Showtime series Billions.
She performed the role of Kate Monster/Lucy the Slut in Avenue Q and performed in the musical Vanities, in which she played the character of Joanne. She was nominated for the Tony Award for Best Featured Actress in a Play in 2015 for her performance in Hand to God and the Tony Award for Best Featured Actress in a Musical in 2019 for her performance in Tootsie. She also voiced Spinel in Steven Universe: The Movie (2019), and Steven Universe Future (2020). She can also be heard as diva Emma Olivia in As the Curtain Rises, an original Broadway soap opera from the Broadway Podcast Network.