Gustav Fröhlich
as Freder Fredersen

Brigitte Helm
as Maria / The Machine Man

Alfred Abel
as Johann 'Joh' Fredersen

Rudolf Klein-Rogge
as C.A. Rotwang

Theodor Loos
as Josaphat

Fritz Rasp
as The Thin Man

Erwin Biswanger
as No. 11811 - Georgy

Heinrich George
as Grot

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

Grete Berger
as Working Woman (uncredited)

Olly Boeheim
as Working Woman (uncredited)

Heinrich Gotho
as Master of Ceremonies (uncredited)

Gottfried Huppertz
as Man Playing Violin (uncredited)

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

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

Rose Lichtenstein
as Working Woman (uncredited)

Hanns Leo Reich
as Marinus (uncredited)

Arthur Reinhardt
as Working Man (uncredited)

Curt Siodmak
as Working Man (uncredited)

Henrietta Siodmak
as Working Woman (uncredited)

Olaf Storm
as Jan (uncredited)

Rolf von Goth
as Son in Eternal Gardens (uncredited)

Helen von Münchofen
as Woman of Eternal Gardens (uncredited)

Helene Weigel
as Working Woman (uncredited)