How many movies have Kostas Karagiannis and Valia Vrettou collaborated on?

They have worked on 1 movie together! Their first movie together was Πρωτάρη μου ας πρόσεχες (1987) and was their highest rated movie together. They have not worked together since Πρωτάρη μου ας πρόσεχες (1987).