How many movies have Mari Mariano and Rico Yan collaborated on?

They have worked on 4 movies together! Their first movie together was Paano Ang Puso Ko (1997) while their highest rated movie together was Dahil Mahal na Mahal Kita (1998). They have not worked together since Kay Tagal Kang Hinintay (1998). They are most known for their romance films together.