Catherine Shirriff is a Canadian actress who was born in Toronto, Ontario, Canada. Her notable roles include the horror comedy Vampira (1974), Bob Fosse's film All That Jazz (1979), as the Klingon Valkris in ' (1984), Olga Denerenko in Murder in Space (1985), and co-host with Jack Palance of the first season of the ABC television documentary series Ripley's Believe It or Not!. She later became a real estate agent.
Shirriff was married to American financier J. Anthony Forstmann and they have one daughter. Her husband died on January 31, 2023.