Most well known for her ACTRA Award-nominated portrayal of Cathy in the 1970s Canadian sitcom King of Kensington, she is also recognized for her Screen Actors Guild Award-nominated performance as Harriet Miller in the 2002 movie My Big Fat Greek Wedding.
After earning her bachelor's degree in Acting from McGill University, she participated in a Globe Theatre educational tour in Saskatchewan, Canada.
She voiced the characters of Doris, Mrs. Wiggins, and Ms. Pierre in the animated television series Henry's World.
The daughter of a British Army physician, she was born in Kent, England, and raised in Africa, Germany, the United States, and Canada. Her marriage to stage actor McCowan Thomas began in the late 1970s and produced children named Julia and Alec.
She and Dan Aykroyd were both in the cast of the CBC children's comedy series Coming Up Rosie.