How many movies have Al Pacino and Diane Keaton acted in together?

They have worked on 5 movies together! Their first movie together was The Godfather (1972) while their highest rated movie together was The Godfather 1901–1959: The Complete Epic (1981). They have not worked together since The Godfather Trilogy: 1901-1980 (1992). They are most known for their drama films together.