| Person | Type | Job | Role(s) |
|---|---|---|---|
 Arthur Johnston | Crew | Sound | Music |
Arthur Sheekman | Crew | Writing | Writer, Additional Dialogue |
Bert Kalmar | Crew | Sound | Music, Story, Lyricist, Writer |
Cliff Shirpser | Crew | Camera | First Assistant Camera |
 Dale Van Sickel | Crew | Crew | Stunts |
 Edward Dmytryk | Crew | Editing | Assistant Editor |
Hans Dreier | Crew | Art | Art Direction |
Harry Lindgren | Crew | Sound | Sound Engineer |
Harry Ruby | Crew | Sound | Music, Story, Lyricist, Writer |
Henry Sharp | Crew | Camera | Director of Photography |
 Herman J. Mankiewicz | Crew | Production | Producer |
 John Leipold | Crew | Sound | Original Music Composer |
LeRoy Stone | Crew | Editing | Editor |
 Leo McCarey | Crew | Directing | Director |
Nat Perrin | Crew | Crew | Additional Dialogue, Writer |
Wiard B. Ihnen | Crew | Art | Art Direction |
 Carrie Daumery | Cast | Actress | Reception Guest (uncredited) |
 Charles Middleton | Cast | Actor | Prosecutor |
 Charles West | Cast | Actor | Minister (uncredited) |
 Chico Marx | Cast | Actor | Chicolini |
Dale Van Sickel | Cast | Actor | A Palace Guard (uncredited) |
 Davison Clark | Cast | Actor | Minister of Finance #2 (uncredited) |
 Dennis O'Keefe | Cast | Actor | Bridegroom at Firefly's Reception (uncredited) |
 E.H. Calvert | Cast | Actor | Officer in Battle Sequence (uncredited) |
 Edgar Kennedy | Cast | Actor | Street Vendor |
 Edmund Breese | Cast | Actor | Zander |
 Edmund Mortimer | Cast | Actor | Minister (uncredited) |
 Edward Arnold | Cast | Actor | Politician (uncredited) |
 Edwin Maxwell | Cast | Actor | Freedonia's Secretary of War #1 (uncredited) |
 Eric Mayne | Cast | Actor | Third Judge (uncredited) |
 Florence Wix | Cast | Actress | Reception Guest (uncredited) |
 Frederick Sullivan | Cast | Actor | Second Judge (uncredited) |
 George MacQuarrie | Cast | Actor | First Judge (uncredited) |
 Groucho Marx | Cast | Actor | Rufus T. Firefly |
 Harpo Marx | Cast | Actor | Pinky |
 Joseph Crehan | Cast | Actor | Dignitary at Reception (uncredited) |
Leo Sulky | Cast | Actor | Agitator (uncredited) |
 Leonid Kinskey | Cast | Actor | Sylvanian Agitator |
 Louis Calhern | Cast | Actor | Ambassador Trentino |
 Louise Closser Hale | Cast | Actress | Reception Guest (uncredited) |
 Margaret Dumont | Cast | Actress | Gloria Teasdale |
Mario Dominici | Cast | Minister (uncredited) | |
 Maude Turner Gordon | Cast | Actress | Reception Guest (uncredited) |
 Raquel Torres | Cast | Actress | Vera Marcal |
 Sidney Bracey | Cast | Actor | Mrs. Teasdale's Butler (uncredited) |
 Verna Hillie | Cast | Actress | Trentino's Blonde Secretary (uncredited) |
 Wade Boteler | Cast | Actor | Officer at Battle Headquarters (uncredited) |
 William Worthington | Cast | Actor | First Minister of Finance (uncredited) |
 Zeppo Marx | Cast | Actor | Bob Roland |
 Edward LeSaint | Cast | Actor | Secretary of Labor (uncredited) |
| Person | Type | Job | Role(s) |
