How many movies have Frederica von Stade and Ileana Cotrubas acted in together?

They have worked on 3 movies together! Their first movie together was The Marriage of Figaro (1974) while their highest rated movie together was Idomeneo (1982). They have not worked together since Metropolitan Opera Gala James Levine's 25th Anniversary (1996). They are most known for their music films together.