Blond, blue-eyed, genteel-looking British leading actress, initially trained as a singer and dancer. A star of the West End musical stage, she was celebrated for her roles in "Sally" (1921) and "Primrose" (1924). Thatcher began in films as an extra in 1915. She spent time in Hollywood from 1937 to 1944, specialising in upper-class characterisations, which, though delineated by precise diction and witty repartee, often bordered on caricature. She was said to be wearing her monocle even when playing tennis!.