How many movies have Kostas Psarras and Kostas Vakkas collaborated on?

They have worked on 4 movies together! Their first movie together was And All 14 Were Wonderful! (1965) while their highest rated movie together was Μπετόβεν και Μπουζούκι (1965). They have not worked together since To Be or Not To Be (1966). They are most known for their comedy films together.