 | Boris Karloff als Hjalmar Poelzig |
 | Bela Lugosi als Dr. Vitus Werdegast |
 | David Manners als Peter Alison |
 | Julie Bishop als Joan Alison |
 | Egon Brecher als The Majordomo |
 | Harry Cording als Thamal |
 | Lucille Lund als Karen |
 | Henry Armetta als The Sergeant |
 | Albert Conti als The Lieutenant |
 | John Carradine als Cult Organist |
 | John George als Cultist (uncredited) |
 | Albert Pollet als Waiter (uncredited) |
| Edgar G. Ulmer | Director |
| John J. Mescall | Director of Photography |
| Peter Ruric | Screenplay |
| Peter Ruric | Story |
| Edgar G. Ulmer | Story |
| E.M. Asher | Supervising Producer |
| Carl Laemmle Jr. | Producer |
| Heinz Roemheld | Music |
| Ray Curtiss | Editor |
| Charles D. Hall | Art Direction |
| Edgar G. Ulmer | Costume Design |
| Jack Pierce | Makeup Artist |
| William J. Reiter | Assistant Director |
| Sam Weisenthal | Assistant Director |
| Edgar G. Ulmer | Set Designer |
| Gilbert Kurland | Sound |
| Tom Kilpatrick | Screenplay |
| M.F. Murphy | Production Manager |
| Roman Freulich | Still Photographer |
| Edgar Allan Poe | Short Story |
