How many movies have Lew Ayres and Lionel Barrymore acted in together?

They have worked on 9 movies together! Their first movie together was Young Dr. Kildare (1938) while their highest rated movie together was The People Vs. Dr. Kildare (1941). They have not worked together since Dr. Kildare's Victory (1942). They are most known for their drama films together.