How many movies have Konstantin Ernst and Nikolay Fomenko collaborated on?

They have worked on 4 movies together! Their first movie together was Старые песни о главном (1996) while their highest rated movie together was Old Songs about the Main Thing 4: Postscript (2000). They have not worked together since Old Songs about the Main Thing 4: Postscript (2000). They are most known for their music films together.