How many movies have Marc Prill and Stefan Bartmann collaborated on?

They have worked on 4 movies together! Their first movie together was Rosamunde Pilcher: Wenn das Herz zerbricht (2010) while their highest rated movie together was Rosamunde Pilcher: Verlobt, verliebt, verwirrt (2011). They have not worked together since Rosamunde Pilcher: Geerbtes Glück (2018).