How many movies have Mariele Millowitsch and Peter Millowitsch acted in together?

They have worked on 9 movies together! Their first movie together was Millowitsch Theater - Drei kölsche Jungen (1980) while their highest rated movie together was Millowitsch Theater - Die spanische Fliege (1986). They have not worked together since Millowitsch Theater - Die vertagte Hochzeitsnacht (1988). They are most known for their comedy films together.