How many movies have Danny L. Zialcita and Ronaldo Valdez collaborated on?

They have worked on 12 movies together! Their first movie together was Ikaw... at ang Gabi (1979) while their highest rated movie together was Dear Heart (1981). They have not worked together since Paano ang Ngayon Kung Wala ang Kahapon (1995). They are most known for their drama films together.