How many movies have B. V. S. N. Prasad and Kotagiri Venkateswara Rao collaborated on?

They have worked on 4 movies together! Their first movie together was Ee Abbai Chala Manchodu (2003) while their highest rated movie together was Chatrapathi (2005). They have not worked together since Radha (2017). They are most known for their romance films together.