How many movies have Maria Gruber and Markus Schleinzer 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).