Gustav Fröhlich
Freder Fredersen

Brigitte Helm
Maria / The Machine Man

Alfred Abel
Johann 'Joh' Fredersen

Rudolf Klein-Rogge
C.A. Rotwang

Theodor Loos
Josaphat

Fritz Rasp
The Thin Man

Heinrich George
Grot

Fritz Alberti
Creative Human - Man Who Convinces Babel (uncredited)

Georg John
Working Man Who Causes Explosion of M-Machine (uncredited)

Margarete Lanner
Woman of Eternal Gardens / Lady in Car (uncredited)

Curt Siodmak
Working Man (uncredited)

Olaf Storm
Jan (uncredited)

Rolf von Goth
Son in Eternal Gardens (uncredited)