The Blue Angel The Blue Angel The Blue Angel () is a 1930 German tragicomedic film directed by Josef von Sternberg and starring Emil Jannings, Marlene Dietrich and Kurt Gerron. Written by Carl Zuckmayer, Karl Vollmöller and Robert Liebmann – with uncredited contributions by Sternberg – it is based on Heinrich Mann's 1905 novel "Professor Unrat" ("Professor Garbage") and set in Weimar Germany. "The Blue Angel" presents the tragic transformation of a respectable professor to a cabaret clown and his descent into madness. The film is the first feature-length German full-talkie and brought Dietrich international fame. In addition, it introduced her signature song,
Louis Dietrich Louis Dietrich Louis Frederick Dietrich (September 13, 1868 – after 1930) was an automobile dealer and politician in Ontario, Canada. He served as mayor of Waterloo from 1929 to 1930. He was born in St. Agatha, apprenticed as a blacksmith in Baden and set up shop in St. Agatha in 1892. In 1893, he became a dealer for John Deere farm implements. In 1909, he moved to Waterloo and, two years later, he became a dealer for International Harvester. In 1915, he became a dealer for the Ford Motor Company. The following year, Dietrich became a Dodge franchisee. He served