Guinevere Turner
- Birthday: 1968-05-23
- Place of birth: Boston, Massachusetts, USA
- Also know as: Guinevere Jane Turner
Guinevere Turner (May 23, 1968) is an American actress, writer and director. She was born in Boston, Massachusetts. She is best known as the screenwriter of such films as American Psycho and The Notorious Bettie Page and for playing the lead role of the dominatrix, Tanya Cheex, in Preaching to the Perverted.
