How many movies have Ruggero Mastroianni and Ubaldo Terzano collaborated on?

They have worked on 14 movies together! Their first movie together was Il marito è mio e l'ammazzo quando mi pare (1968) while their highest rated movie together was Investigation of a Citizen Above Suspicion (1970). They have not worked together since Montecarlo Gran Casinò (1987). They are most known for their comedy films together.