How many movies have Alfred Næss and Arve Opsahl collaborated on?

They have worked on 3 movies together! Their first movie together was Congratulations Andersens! (1966) while their highest rated movie together was The Olsen Gang and Data-Harry Blows Up The World Bank (1978). They have not worked together since The Olsen Gang and Data-Harry Blows Up The World Bank (1978). They are most known for their comedy films together.