- Colin Clive as Henry Frankenstein
- Mae Clarke as Elizabeth Lavenza, Henry's fiancée
- John Boles as Victor Moritz, Henry's friend
- Boris Karloff as The Monster (credited as ?)
- Edward Van Sloan as Dr. Waldman
- Frederick Kerr as Baron Frankenstein
- Dwight Frye as Fritz, Henry's assistant
- Lionel Belmore as Herr Vogel
- Marilyn Harris as Little Maria, a little girl
- Michael Mark as Ludwig, Maria's father
- Francis Ford as Hans (uncredited)[6]
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