Margaret Bannerman was born on December 15, 1896 in Toronto, Ontario, Canada as Marguerite Grand. She is known for her work on Cluny Brown (1946), Lady Audley's Secret (1920) and Her Secret (1919). She was married to Anthony Prinsep (London producer) and Pat Somerset. She died on April 25, 1976 in Englewood, New Jersey, USA.