How many movies have Aleksandr Zatsepin and Lev Kushelevich collaborated on?

They have worked on 4 movies together! Their first movie together was Sovershenno seryozno (1961) while their highest rated movie together was Приятного аппетита (1961). They have not worked together since Как создавался Робинзон (1961). They are most known for their comedy films together.