How many movies have Panchu Arunachalam and Thengai Srinivasan collaborated on?

They have worked on 18 movies together! Their first movie together was Annakili (1976) while their highest rated movie together was Aarilirunthu Arubathu Varai (1979). They have not worked together since Vaazhkai (1984). They are most known for their drama films together.