How many movies have Angelo Iacono and Lanfranco Diotallevi collaborated on?

They have worked on 3 movies together! Their first movie together was Listen, Let's Make Love (1968) while their highest rated movie together was Principe coronato cercasi per ricca ereditiera (1970). They have not worked together since Principe coronato cercasi per ricca ereditiera (1970). They are most known for their comedy films together.