How many movies have Cosma Shiva Hagen and Otto Waalkes acted in together?

They have worked on 4 movies together! Their first movie together was 7 Dwarves - Men Alone in the Woods (2004) while their highest rated movie together was Otto - Geboren um zu blödeln (2015). They have not worked together since Otto - Geboren um zu blödeln (2015). They are most known for their fantasy films together.