How many movies have Diana Krall and Joni Mitchell acted in together?

They have worked on 4 movies together! Their first movie together was An All-Star Tribute to Joni Mitchell (2000) while their highest rated movie together was Joni Mitchell - The Library of Congress Gershwin Prize For Popular Song (2023). They have not worked together since Joni Mitchell - The Library of Congress Gershwin Prize For Popular Song (2023). They are most known for their music films together.