The Mad Genius

John Barrymore

Vladimar Ivan Tsarakov

Marian Marsh

Nana Carlova

Charles Butterworth

Karimsky

Donald Cook

Fedor Ivanoff

Luis Alberni

Sergei Bankieff

Carmel Myers

Sonya Preskoya

André Luguet

Count Robert Renaud

Frankie Darro

Fedor as a Boy

Chester A. Bachman

Poster Hanger (uncredited)

Charles Brinley

Poster Hanger (uncredited)

Boris Karloff

Fedor's Father (uncredited)

Mae Madison

Olga Chekova (uncredited)