| Person | Type | Job | Role(s) |
|---|---|---|---|
 Alexander Golitzen | Crew | Art | Art Direction |
Bernard B. Brown | Crew | Sound | Sound Director |
Charles S. Gould | Crew | Directing | Assistant Director |
 Curt Siodmak | Crew | Writing | Screenplay, Adaptation |
Edward Locke | Crew | Writing | Theatre Play |
Edward Ward | Crew | Sound | Original Music Composer, Music Director |
 George Waggner | Crew | Directing | Director, Producer |
Hal Mohr | Crew | Camera | Director of Photography |
Ira Webb | Crew | Art | Set Decoration |
 Jack Pierce | Crew | Costume & Make-Up | Makeup Artist |
John B. Goodman | Crew | Art | Art Direction |
John P. Fulton | Crew | Visual Effects | Visual Effects |
Joseph Gershenson | Crew | Production | Executive Producer |
Lynn Starling | Crew | Writing | Screenplay |
Russell A. Gausman | Crew | Art | Set Decoration |
Russell F. Schoengarth | Crew | Editing | Editor |
Vera West | Crew | Costume & Make-Up | Costume Design |
W. Howard Greene | Crew | Camera | Director of Photography |
William R. Fox | Crew | Sound | Sound |
Harold Zweifel | Crew | Sound | Orchestrator |
 Anne Cornwall | Cast | Actress | Audience Member (Uncredited) |
 Boris Karloff | Cast | Actor | Dr. Friedrich Hohner |
 Eddie Polo | Cast | Actor | Stagehand (Uncredited) |
 Eric Mayne | Cast | Actor | Audience Member (Uncredited) |
 Ernie Adams | Cast | Actor | Man in Audience Next to Franz (Uncredited) |
 Ernö Verebes | Cast | Actor | Brunn |
 Francis Ford | Cast | Actor | Backstage Attendant (Uncredited) |
 Gale Sondergaard | Cast | Actress | Luise |
 George Dolenz | Cast | Actor | Amato Roselli |
 Gertrude Astor | Cast | Actress | Woman in Audience Behind Franz (Uncredited) |
 Grace Cunard | Cast | Actress | Backstage Maid (Uncredited) |
 Helen Gibson | Cast | Actress | Audience Member (Uncredited) |
 Jack Richardson | Cast | Actor | Musical Conductor (Uncredited) |
 Jane Farrar | Cast | Jarmila Vadek | |
 June Vincent | Cast | Actress | Marcellina |
 Lotte Stein | Cast | Actress | Mama Hinzl |
 Louis Payne | Cast | Audience Member (Uncredited) | |
 Ludwig Stössel | Cast | Actor | Carl Baumann |
 Maurice Costello | Cast | Actor | Audience Member (Uncredited) |
Paul Power | Cast | Actor | Reporter (Uncredited) |
Polly Bailey | Cast | Actress | Cleaning Woman (Uncredited) |
 Rudy Bowman | Cast | Actor | Audience Member (Uncredited) |
 Scotty Beckett | Cast | Actor | The King |
 Stuart Holmes | Cast | Actor | King's Consul (Uncredited) |
 Susanna Foster | Cast | Actress | Angela Klatt |
 Thomas Gomez | Cast | Actor | Count Seebruck |
 Turhan Bey | Cast | Actor | Franz Munzer |
 William Desmond | Cast | Actor | Backstage Technician (Uncredited) |
 William Edmunds | Cast | Actor | Leon, Theatre Concierge |
 William H. O'Brien | Cast | Actor | Audience Member (Uncredited) |
Harry Mayo | Cast | Actor | Audience Member (Uncredited) |
 Richard Neill | Cast | Actor | Audience Member (Uncredited) |
Dorothy Lawrence | Cast | Miss Metzger | |
Barry Regan | Cast | Audience Member (Uncredited) | |
Bella Lewitzky | Cast | Dancer (Uncredited) | |
Maxwell Hayes | Cast | Count Romburg | |
| Person | Type | Job | Role(s) |
