Katja Bienert recalls as her mother Evelyn, who did her management, arranged a meeting with production-assistant Otto Retzer in the Kempinski in Berlin: The famous producer Carl Spiehs was hiding behind a newspaper taking a glance at her and decided without casting to give her the main role as Petra. "When we where shooting in summer 1978 I was 11 years old, looking like a sixteen-year-old, which made the harmless nude scenes delicate. As I looked like a grown-up already at the age of eleven, taking off the cloths was like a freeing therapy." She said she was full of complexes over her early-blooming voluptuous body, but she was already used to being nude in front of people. She had already posing nude for photographers Lutz Stark and Jim Rakete. Even at that young age, she could see that men were attracted to her.
Katja Bienert and her mother, Evelyn Gutkind-Bienert, acted together in both this film and in Kenn' ich, weiß ich, war ich schon! (1981).
The film was made after the publication of the book 'Wir Kinder vom Bahnhof Zoo' and the title and theme are clearly linked to this book, as well as to the Schoolgirl Report series, for which director Walter Boos also worked. Apart from that, there are no connections to the film, adaptation of the book, Eu, Christiane F., 13 Anos, Drogada e Prostituída (1981), which was produced two years later.
Italian censorship visa # 75199 delivered on 12 September 1980.