Michael Curtiz Director James Cagney George M. Cohan Actor Joan Leslie Mary Actor Walter Huston Jerry Cohan Actor Richard Whorf Sam Harris Actor George Tobias Dietz Actor Irene Manning Fay Templeton Actor Rosemary DeCamp Nellie Cohan Actor Jeanne Cagney Josie Cohan Actor S.Z. Sakall Schwab Actor George Barbier Erlanger Actor Walter Catlett Manager Actor Frances Langford Singer Actor Minor Watson Albee Actor Eddie Foy Jr. Eddie Foy Actor Chester Clute Goff Actor Douglas Croft George M. Cohan, at 13 Actor Patsy Lee Parsons Josie Cohan, As a Girl of 12 Actor Capt. Jack Young The President Actor Audrey Long Dietz & Goff's receptionst (uncredited) Actor Odette Myrtil Madame Bartholdi Actor Clinton Rosemond White House butler (uncredited) Actor Spencer Charters Colony Opera House stage manager (uncredited) Actor Phyllis Kennedy Fanny (uncredited) Actor Pat Flaherty Sgt. Lewis (White House guard) (uncredited) Actor Leon Belasco Magician (uncredited) Actor Robert Buckner Writer Edmund Joseph Writer Hal B. Wallis Executive Producer Jack L. Warner Executive Producer George M. Cohan Original Music Ray Heindorf Original Music Heinz Roemheld Original Music James Wong Howe Cinematographer George Amy Film Editing Carl Jules Weyl Art Director Milo Anderson Costume Design