| Cast overview, first billed only: | |||
| Emil Jannings | ... | Professor Immanuel Rath | |
| Marlene Dietrich | ... | Lola Lola | |
| Kurt Gerron | ... | Kiepert, the Magician | |
| Rosa Valetti | ... | Guste, His Wife | |
| Hans Albers | ... | Mazeppa, the Strong Man | |
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Reinhold Bernt | ... | Der Clown / The Clown |
| Károly Huszár | ... | Proprietor of The Blue Angel (as Karl Huszar-Puffy) | |
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Die Weintraub Syncopators | ... | Group Cast Performers (as The Weintraub Syncopators) |
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Eduard von Winterstein | ... | Schuldirektor / The Director of School (as Eduard V. Winterstein) |
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Hans Roth | ... | Hausmeister / The Caretaker of the Secondary School |
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Rolf Müller | ... | Gymnasiast Angst / Pupil |
| Roland Varno | ... | Gymnasiast Lohmann / Pupil (as Rolant Varno) | |
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Carl Balhaus | ... | Gymnasiast Ertzum / Pupil (as Karl Balhaus) |
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Robert Klein-Lörk | ... | Gymnasiast Goldstaub / Pupil |
| Wilhelm Diegelmann | ... | Kapitän / Captain | |
Germany 1924. Middle aged Dr. Immanuel Rath is a stuffy literature professor at a boys' school. Most of his students don't much like him, often ridiculing him by sending him unflattering anonymous notes and drawings. Dr. Rath learns that many of his boys often frequent a cabaret called the Blue Angel, which he believes is corrupting their impressionable young minds. He heads to the Blue Angel himself to catch the boys in the act, shame them into not going again, but also to ask the headlining performer, anglophone Lola Lola, to cease and desist performing her show. Over several visits, Rath is able to catch the boys, but he himself starts to fall for Lola, and she seemingly with him. His infatuation with her threatens his teaching career. Their relationship ends up not being what either envisioned, the question being how they will both deal with their disintegrating relationship and the reasons behind that disintegration. Written by Huggo
Today, most people know this film as featuring Marlene Dietrich's signature tune "Falling in Love Again." But it was the first sound film to be made in Germany; and is the first great sound film to be made anywhere. Although it exists also in an English version that was made at the same time, both Dietrich and Jannings give better performances in their native language; and, as the sound is rather poor, it is easier to follow in German with the English sub-titles. Jannings was the first actor to win an Academy Award (though not for this film) and his performance as the professor who is lead to ruin by a femme fatale remains one of the memorable film performances. Fans of Dietrich should not miss this film which brought her international success. This is one of those films that only grows with continued viewing. If you were fond of Cabaret, then this is the real Germany between the World Wars. Highly recommended.