US actor. He played acrobatic, swashbuckling heroes in silent films such as The Mark of Zorro (1920), The Three Musketeers (1921), Robin Hood (1922), The Thief of Bagdad (1924), and Don Quixote (1925). He was married to the film star Mary Pickford 192035. In 1919 they founded United Artists with Charlie Chaplin and D W Griffith.