How many movies have Markus Schleinzer and Michael Ostrowski collaborated on?

They have worked on 2 movies together! Their first movie together was Slumming (2006) while their highest rated movie together was The Unintentional Kidnapping of Mrs. Elfriede Ott (2010). They have not worked together since The Unintentional Kidnapping of Mrs. Elfriede Ott (2010).