Polly Shannon (born September 1, 1973) is a Canadian actress. She is best known for her portrayal of Margaret Trudeau in the 2002 miniseries Trudeau, a film about the late Prime Minister of Canada Pierre Trudeau.
Polly Shannon was born September 1, 1973 in Kingston, Ontario, and raised in Aylmer, Quebec. Her father, Michael Shannon, is a doctor who served in various senior posts at Health Canada, including director general for the Laboratory Centre for Disease Control. Her mother, Mary Mackay-Smith, is a screenwriter for children's films and television. At the age of 13, after acting in theatre as a child, Shannon became a model, with assignments that took her to New York, London, and Tokyo. She attended Philemon Wright High School in Hull, Quebec.
In 1992, Shannon began her television career, landing a part in Catwalk, a YTV series about a struggling rock band. She went on to appear in several television series, including Sirens (1994) as Kelly Van Pelt, Ready or Not (1996) as Angelique, Side Effects (1996) as Lisa Burns, and the Canadian horror series The Hunger (1999) as Jen.