How many movies have Marius Müller and Tom Mathisen collaborated on?

They have worked on 2 movies together! Their first movie together was Prima Veras saga om Olav den Hellige (1983) while their highest rated movie together was Showbiz: or how to become a celebrity in 1-2-3! (1989). They have not worked together since Showbiz: or how to become a celebrity in 1-2-3! (1989).