How many movies have Gianni Ferrio and Judith Dornys collaborated on?

They have worked on 3 movies together! Their first movie together was The Sweet Sins of Sexy Susan (1967) while their highest rated movie together was The Viking Who Became a Bigamist (1969). They have not worked together since The Viking Who Became a Bigamist (1969). They are most known for their comedy films together.