1. Friedrich Rudolf Klein, better known as Rudolf Klein-Rogge, was a German film actor, best 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.

1. Friedrich Rudolf Klein, better known as Rudolf Klein-Rogge, was a German film actor, best 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.
Rudolf Klein-Rogge 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.
Friedrich Rudolf Klein-Rogge Klein was born in Cologne, Germany on 24 November 1885.
Rudolf Klein-Rogge's father, Hermann Rudolf Klein, was a military lawyer who served as for the 15th Division of the Prussian Army, garrisoned at Cologne.
On his deathbed Rudolf Klein-Rogge confided to a friend that when a teacher went after him he ran away from school.
Rudolf Klein-Rogge spent three years at the University of Bonn and in Berlin, studying art history.
Rudolf Klein-Rogge began taking acting lessons from Hans Siebert, a veteran of Vienna's Burgtheater, and made his stage debut in 1909, playing Cassius in Julius Caesar in Halberstadt.
In 1918, the pair moved to Berlin to capitalize on von Harbou's writing skills and her budding career as a scenarist and screenwriter, while Rudolf Klein-Rogge was hired by Victor Barnowsky, director of Berlin's Lessing Theater.
Rudolf Klein-Rogge's intense look led him to similar roles such as a tyrant in Fritz Wendhausen's Der steinerne Reiter, a pirate in Arthur Robison's Pietro der Korsar, and the Czar in Alexandre Volkoff's Casanova.
Rudolf Klein-Rogge played the lead roles in two films written and directed by von Harbou: Elisabeth und der Narr and Hanneles Himmelfahrt.
Rudolf Klein-Rogge remarried twice, first to Margarete Neff, and lastly with the Swedish actress Mary Johnson in 1932, to whom he remained married until his death in 1955.