How many movies have Joost Siedhoff and Wilhelm Engelhardt collaborated on?

They have worked on 2 movies together! Their first movie together was Walli, die Eisfrau (1998) while their highest rated movie together was Hubert und Staller - Die ins Gras beißen (2013). They have not worked together since Hubert und Staller - Die ins Gras beißen (2013).