Milton Sills. Milton Sills was 43 in The Making of O'Malley as 'O'Malley'.
Dorothy Mackaill. Dorothy Mackaill was 22 in The Making of O'Malley as 'Lucille Thayer'.
Warner Richmond. Warner Richmond was 39 in The Making of O'Malley as 'Danny the Dude'.
Thomas Carrigan. Thomas Carrigan was 39 in The Making of O'Malley as 'Herbert Browne'.
Julia Hurley. Julia Hurley was 77 in The Making of O'Malley as 'Margie's Grandmother'.
Claude King. Claude King was 50 in The Making of O'Malley as 'Capt. Collins'.
Helen Rowland. Helen Rowland was >> in The Making of O'Malley as 'Margie'.
Lambert Hillyer. Lambert Hillyer was 35 in The Making of O'Malley as 'Director'Roy Carpenter. Roy Carpenter was >> in The Making of O'Malley as 'Director of Photography'Eugene Clifford. Eugene Clifford was >> in The Making of O'Malley as 'Writer'Arthur Tavares. Arthur Tavares was 41 in The Making of O'Malley as 'Editor'Gerald Beaumont. Gerald Beaumont was 45 in The Making of O'Malley as 'Story'