If Hape Kerkeling actually had been cast as Dicki Hoppenstedt in Loriot 6 (1978) (his application to Vicco von Bülow is mentioned in the film), he would have played alongside Rudolf Kowalski, the actor who plays his grandfather in this film.
Maren Kroymann starred in several projects of the real Hape Kerkeling, including Kein Pardon (1993) playing Doris, Gisbert (1999) playing various roles and Horst Schlämmer - Isch kandidiere! (2009) playing Renate Hammelböck.
At one moment Hape Kerkeling is singing "Du bist nicht allein", a song by Roy Black. Rudolf Kowalski who is starring in this movie was playing Wolfgang Kaminski, Roy Black's manager in the biopic Le Destin tragique de Roy Black (1996)
The movie poster is styled after the cover of the original book, which this movies is based on.