How many movies have Frank Prange and Joey Murphy acted in together?

They have worked on 3 movies together! Their first movie together was Die Erkenntnis einer Domina (1990) while their highest rated movie together was Heidi 3: In der Heidi ist es doch am schönsten (1990). They have not worked together since Heidi 3: In der Heidi ist es doch am schönsten (1990). They are most known for their comedy films together.