How many movies have Joanne Woodward and Richard Merrell collaborated on?

They have worked on 2 movies together! Their first movie together was Rachel, Rachel (1968) while their highest rated movie together was The Effect of Gamma Rays on Man-in-the-Moon Marigolds (1972). They have not worked together since The Effect of Gamma Rays on Man-in-the-Moon Marigolds (1972).