Gavin Muir (1900–1972) was an American Broadway, film and television actor.Although born in Chicago, Muir was educated in England and had a significant career on the Broadway stage through 1933. His first film appearance is 1932 in a short subject, then in John Ford's Mary of Scotland in 1936. His film career continued through 1965, often in character roles, and with a sort of specialty in villains with British accents.