The Mad Genius

John Barrymore

as Vladimar Ivan Tsarakov

Marian Marsh

as Nana Carlova

Charles Butterworth

as Karimsky

Donald Cook

as Fedor Ivanoff

Luis Alberni

as Sergei Bankieff

Carmel Myers

as Sonya Preskoya

André Luguet

as Count Robert Renaud

Frankie Darro

as Fedor as a Boy

Chester A. Bachman

as Poster Hanger (uncredited)

Charles Brinley

as Poster Hanger (uncredited)

Boris Karloff

as Fedor's Father (uncredited)

Mae Madison

as Olga Chekova (uncredited)

Walter Miller

as Opera Spectator (uncredited)

Lee Moran

as Montmartre Cabaret Director (uncredited)

Charles Williams

as Stagehand (uncredited)

Harry Wilson

as Curtain Man (uncredited)