How many movies have Hans Billian and Yvonne Marroth collaborated on?

They have worked on 2 movies together! Their first movie together was Heiratswilliges Döschen gesucht! (1979) while their highest rated movie together was Eine verdammt heisse Braut 1 (1989). They have not worked together since Eine verdammt heisse Braut 1 (1989).