How many movies have Katharina Millowitsch and Willy Millowitsch acted in together?

They have worked on 4 movies together! Their first movie together was Millowitsch -Theater: Zwangseinquartierung (1964) and was their highest rated movie together. They have not worked together since Millowitsch Theater - Tante Jutta aus Kalkutta (1990). They are most known for their comedy films together.