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Veteran stage actor James T. Mack (born McElhern) originated the role of Johnny-the-Harp in Eugene O'Neil's Anna Christie, which opened on Broadway November 2, 1921, with Pauline Lord in the title role. An infrequent supporting actor in films from the mid-1910s, Mack repeated his performance for the motion picture cameras in Greta Garbo's English-language version in 1930 but then spent the remainder of his career playing unbilled bit parts in films ranging from Bonnie Scotland (1935; as the butler) to Alias Boston Blackie (1942; as the valet).