How many movies have Ariane Zeller and Tina Ruland collaborated on?

They have worked on 3 movies together! Their first movie together was Verführung in 6 Gängen (2004) while their highest rated movie together was Was heißt hier Oma! (2007). They have not worked together since Das total verrückte Wochenende (2009). They are most known for their comedy films together.