
Friedrich Rudolf Klein-Rogge (24 November 1885 – 29 May 1955) was a German film actor. Klein-Rogge is known for playing sinister figures in films in the 1920s and 1930s as well as being a mainstay in director Fritz Lang's Weimar-era films. He is probably best known in popular culture, particularly to English-speaking audiences, for playing the archetypal mad scientist role of C. A. Rotwang in Lang's Metropolis and as the criminal genius Doctor Mabuse.

Metropolis
1927 · as C.A. Rotwang

The Cabinet of Dr. Caligari
1920 · as Criminal (uncredited)

The Gypsy Baron
1927

The Testament of Dr. Mabuse
1933 · as Dr. Mabuse

Destiny
1921 · as Dervish / Girolamo

Dr. Mabuse, the Gambler
1922 · as Dr. Mabuse

Loves of Casanova
1927 · as Peter III

Die Nibelungen: Kriemhild's Revenge
1924 · as King Etzel (Attila)

Die Nibelungen: Siegfried
1924 · as King Etzel

Parkstrasse 13
1939 · as Direktor Bremer

The Valley of Love
1935 · as Herr von Roden

Spies
1928 · as Haghi

Truxa
1937 · as Varieté-Direktor

Die Sandgräfin
1928

Menschen vom Varieté
1939 · as Kommissar Wiedemann

After Midnight
1938

Kora Terry
1940

Tingel Tangel
1927 · as Don Fabio Coridon