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,
Marlene Dietrich Riva, was born in Berlin on 13 December 1924. She would later become an actress, primarily working in television. When Maria gave birth to a son (John, later a famous production designer) in 1948, Dietrich was dubbed "the world's most glamorous grandmother". After Dietrich's death, Riva published an honest and highly acclaimed biography of her mother, titled "Marlene Dietrich" (1992). Throughout her career, Dietrich had an unending string of affairs, some short-lived, some lasting decades. They often overlapped and were almost all known to her husband, to whom she was in the habit of passing the love letters from her