How many movies have Dieter Kehler and Siemen Rühaak collaborated on?

They have worked on 3 movies together! Their first movie together was Rosamunde Pilcher: Dornen im Tal der Blumen (1998) while their highest rated movie together was Rosamunde Pilcher: Eine Liebe im Herbst (2009). They have not worked together since Rosamunde Pilcher: Eine Liebe im Herbst (2009). They are most known for their romance films together.