How many movies have Ruth-Maria Kubitschek and Thomas Jacob collaborated on?

They have worked on 4 movies together! Their first movie together was Einmal Himmel und retour (2000) while their highest rated movie together was Wunschkinder und andere Zufälle (2003). They have not worked together since Mamas Flitterwochen (2008). They are most known for their drama films together.