How many movies have Julia Dietze and Udo Kier acted in together?

They have worked on 4 movies together! Their first movie together was 1½ Ritter - Auf der Suche nach der hinreißenden Herzelinde (2008) while their highest rated movie together was Iron Sky (2012). They have not worked together since Iron Sky: The Coming Race (2019). They are most known for their comedy films together.