How many movies have Nikolai Cherkasov and Sergei Prokofiev collaborated on?

They have worked on 4 movies together! Their first movie together was Alexander Nevsky (1938) while their highest rated movie together was Ivan the Terrible, Part II: The Boyars' Plot (1958). They have not worked together since Ivan the Terrible, Part II: The Boyars' Plot (1958). They are most known for their history films together.