How many movies have Günther Siegmund and Ulla Mahrt collaborated on?

They have worked on 4 movies together! Their first movie together was Ohnsorg Theater - Mutter steht ihren Mann (1963) while their highest rated movie together was Otto und die nackte Welle (1968). They have not worked together since Otto und die nackte Welle (1968). They are most known for their comedy films together.