How many movies have Arve Opsahl and Per Lillo-Stenberg acted in together?

They have worked on 4 movies together! Their first movie together was Congratulations Andersens! (1966) while their highest rated movie together was The Olsen Gang Never Gives Up! (1981). They have not worked together since The Olsen Gang's Last Trick (1999). They are most known for their comedy films together.