How many movies have Günther Illi and Sonja Kirchberger collaborated on?

They have worked on 2 movies together! Their first movie together was Alpenglühen zwei - Liebe versetzt Berge (2005) while their highest rated movie together was Die Zürcher Verlobung - Drehbuch zur Liebe (2007). They have not worked together since Die Zürcher Verlobung - Drehbuch zur Liebe (2007).