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Warner Oland as Dr. Boris Karlov |
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June Collyer as Kitty Conover |
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Lloyd Hughes as Prince Nicholas Petroff |
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Clara Blandick as Aunt Abbie |
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Hale Hamilton as Martin Kent |
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Wallace MacDonald as Prince Gregor Petroff |
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George Fawcett as General Petroff |
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Florence Lake as Anya Karlov |
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Mischa Auer as Peter |
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Ernest Hilliard as Prince Ivan Petroff |
| Directing | George B. Seitz | Director |
| Sound | Corson Jowett | Sound |
| Production | Phil Goldstone | Producer |
| Writing | Florence Ryerson | Dialogue |
| Writing | Harold McGrath | Story |
| Art | Fay Babcock | Art Direction |
| Art | Ralph M. DeLacy | Settings |
| Directing | Florence Ryerson | Continuity |
| Editing | Otto Ludwig | Editor |
| Camera | Arthur Reed | Director of Photography |
