How many movies have Ilja Richter and Theo Lingen acted in together?

They have worked on 6 movies together! Their first movie together was Wer zuletzt lacht, lacht am besten (1971) while their highest rated movie together was Tante Trude aus Buxtehude (1971). They have not worked together since Betragen ungenügend! (1972). They are most known for their comedy films together.