How many movies have Erwin Halletz and Udo Jürgens collaborated on?

They have worked on 4 movies together! Their first movie together was Unsere tollen Tanten (1961) while their highest rated movie together was Drei Liebesbriefe aus Tirol (1962). They have not worked together since Unsere tollen Tanten in der Südsee (1964). They are most known for their comedy films together.