Linda Darnell. Linda Darnell was 21 in The Great John L. as 'Anne Livingston'.Greg McClure. Greg McClure was >> in The Great John L. as 'John L. Sullivan'.Barbara Britton. Barbara Britton was 25 in The Great John L. as 'Kathy Harkness'.Otto Kruger. Otto Kruger was 59 in The Great John L. as 'Richard Martin'.Wallace Ford. Wallace Ford was 47 in The Great John L. as 'McManus'.George Mathews. George Mathews was 33 in The Great John L. as 'John Flood'.Robert Barrat. Robert Barrat was 55 in The Great John L. as 'Billy Muldoon'.Joel Friedkin. Joel Friedkin was 60 in The Great John L. as 'Michael Sullivan'.Simon Semenoff. Simon Semenoff was >> in The Great John L. as 'Mons. Claire'.Harry Crocker. Harry Crocker was 51 in The Great John L. as 'Arthur Brisbane'.Rory Calhoun. Rory Calhoun was 22 in The Great John L. as 'James J. 'Gentleman Jim' Corbett'.J.M. Kerrigan. J.M. Kerrigan was 60 in The Great John L. as 'Father O'Malley'.Fritz Feld. Fritz Feld was 44 in The Great John L. as 'Claire's manager'.Lee Sullivan. Lee Sullivan was >> in The Great John L. as 'Mickey Steele'.Frank Tuttle. Frank Tuttle was 52 in The Great John L. as 'Director'James Van Trees. James Van Trees was 54 in The Great John L. as 'Director of Photography'James Edward Grant. James Edward Grant was 39 in The Great John L. as 'Writer, Producer'Frank R. Mastroly. Frank R. Mastroly was >> in The Great John L. as 'Producer'Milton Carter. Milton Carter was 35 in The Great John L. as 'Associate Producer'Bing Crosby. Bing Crosby was 42 in The Great John L. as 'Executive Producer'Edward G. Boyle. Edward G. Boyle was 46 in The Great John L. as 'Set Decoration'Bernard Herzbrun. Bernard Herzbrun was 54 in The Great John L. as 'Art Direction'