Contrary to the IMDB summary below, only two of the girls, Klara and Bobo, have no instruments (or talent). The third girl, Hedvig, is a painfully shy classical guitar-playing schoolmate recruited to teach them about music.
This movie is a joy! I don’t know what else to say. See it.
Rating: 
We Are the Best!
Three girls in 1980s Stockholm decide to form a punk band -- despite not having any instruments and being told by everyone that punk is dead.
Director: Lukas Moodysson
Cast: Mira Barkhammar, Mira Grosin, Liv LeMoyne
IMDb rating: 7.1 (11248 votes)