Paul Kalkbrenner is a German musician and producer of electronic music. Because he breaks down his tracks into elements that are reassembled onstage, Kalkbrenner is considered a live act, as opposed to a DJ. He is most known for his single "Sky and Sand", which sold over 200,000 copies, went platinum, and was highly charted in countries such as Belgium and Germany. He is also known for portraying the main character Ickarus in the movie Berlin Calling, written and directed by Hannes Stöhr, which ran for several years at Kino Central in Berlin.

Berlin Calling is a 2008 German tragicomedy film directed by Hannes Stöhr. The film depicts the events following DJ and producer Ickarus's institutionalization for drug abuse.