- Ernö Verebes - Brunn
- Lotte Stein - Mama Hinzl
- Scotty Beckett - The King
- William Edmunds - Leon, Theatre Concierge
- Dorothy Lawrence - Miss Metzger
- Bella Lewitzky - Dancer (Uncredited)
- Jack Richardson - Musical Conductor (Uncredited)
- Polly Bailey - Cleaning Woman (Uncredited)
- Stuart Holmes - King's Consul (Uncredited)
- Eddie Polo - Stagehand (Uncredited)
- Paul Power - Reporter (Uncredited)
- Ernie Adams - Man in Audience Next to Franz (Uncredited)
- Gertrude Astor - Woman in Audience Behind Franz (Uncredited)
- Grace Cunard - Backstage Maid (Uncredited)
- William Desmond - Backstage Technician (Uncredited)
- Francis Ford - Backstage Attendant (Uncredited)
- Louis Payne - Audience Member (Uncredited)
- Anne Cornwall - Audience Member (Uncredited)
- Rudy Bowman - Audience Member (Uncredited)
- William H. O'Brien - Audience Member (Uncredited)
- Helen Gibson - Audience Member (Uncredited)
- Maurice Costello - Audience Member (Uncredited)
- Richard Neill - Audience Member (Uncredited)
- Eric Mayne - Audience Member (Uncredited)
- George Waggner
- Curt Siodmak
- Curt Siodmak
- George Waggner
- Joseph Gershenson
- Bernard B. Brown
Boris Karloff hace el papel de Dr. Friedrich Hohner.
Susanna Foster interpreta a Angela Klatt en la película.
Turhan Bey hace el papel de Franz Munzer.
Gale Sondergaard interpreta a Luise en la película.
Thomas Gomez interpreta a Count Seebruck en la película.
June Vincent interpreta a Marcellina en la película.
George Dolenz interpreta a Amato Roselli en la película.
Ludwig Stössel interpreta a Carl Baumann en la película.
Jane Farrar hace el papel de Jarmila Vadek.
Ernö Verebes interpreta a Brunn en la película.
Lotte Stein interpreta a Mama Hinzl en la película.
Scotty Beckett interpreta a The King en la película.
William Edmunds interpreta a Leon, Theatre Concierge en la película.
Maxwell Hayes hace el papel de Count Romburg.
Dorothy Lawrence hace el papel de Miss Metzger.
Bella Lewitzky interpreta a Dancer (Uncredited) en la película.
Jack Richardson hace el papel de Musical Conductor (Uncredited).
Polly Bailey interpreta a Cleaning Woman (Uncredited) en la película.
Stuart Holmes interpreta a King's Consul (Uncredited) en la película.
Eddie Polo hace el papel de Stagehand (Uncredited).
Paul Power interpreta a Reporter (Uncredited) en la película.
Ernie Adams hace el papel de Man in Audience Next to Franz (Uncredited).
Gertrude Astor interpreta a Woman in Audience Behind Franz (Uncredited) en la película.
Grace Cunard hace el papel de Backstage Maid (Uncredited).
William Desmond interpreta a Backstage Technician (Uncredited) en la película.
Francis Ford hace el papel de Backstage Attendant (Uncredited).
Louis Payne interpreta a Audience Member (Uncredited) en la película.
Anne Cornwall interpreta a Audience Member (Uncredited) en la película.
Rudy Bowman interpreta a Audience Member (Uncredited) en la película.
William H. O'Brien interpreta a Audience Member (Uncredited) en la película.
Helen Gibson interpreta a Audience Member (Uncredited) en la película.
Maurice Costello interpreta a Audience Member (Uncredited) en la película.
Harry Mayo hace el papel de Audience Member (Uncredited).
Richard Neill interpreta a Audience Member (Uncredited) en la película.
Eric Mayne hace el papel de Audience Member (Uncredited).
Barry Regan interpreta a Audience Member (Uncredited) en la película.
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