Sarah Stiles is an American actress and voice actor known for her extensive work on stage and screen. Born in Massachusetts, she trained at the American Musical and Dramatic Academy in New York City before building a career that includes significant contributions to animation.

In the world of anime and animated series, Stiles is best recognized for her role as Spinel, the tragic main antagonist in the 2019 television film Steven Universe: The Movie and its follow-up series Steven Universe Future. Her vocal performance in this role brought to life a complex and emotionally charged character, marking a notable achievement in her voice acting portfolio. She also voiced Mimzy in the adult animated musical series Hazbin Hotel. In addition to these roles, Stiles provided the voice for Lacey in the children's animated series Sunny Day.

Beyond her animation work, Stiles has appeared in live-action television series including Get Shorty, Billions, and Dietland. Her film credits include a role as Jill in the psychological thriller Unsane and as Jillian in the 2023 action film Transformers: Rise of the Beasts.

Stiles has a distinguished background in theater, having performed in numerous Broadway and Off-Broadway productions. Her stage career includes a run in the musical Avenue Q, the original casts of Vanities and Hand to God, and a role in the Broadway revival of On a Clear Day You Can See Forever. She received a Tony Award nomination for Best Featured Actress in a Play in 2015 for her performance in Hand to God and another Tony nomination for Best Featured Actress in a Musical in 2019 for her work in Tootsie.