How many movies have N.T. Rama Rao and Pillavalu Gajapathy Krishnaveni collaborated on?

They have worked on 4 movies together! Their first movie together was Palletoori Pilla (1950) while their highest rated movie together was Panduranga Mahatyam (1957). They have not worked together since Panduranga Mahatyam (1957). They are most known for their drama films together.