Great actor. I was watching Bullitt yesterday, made in 1968, and there was Robert Duvall in a bit role as a cab driver.

In about 1963 he starred in a Twilight Zone episode where he played a guy who was fascinated by a display in a museum. It was a replica of a big house, like a big doll house, and there were figures of a family there including a beautiful lady. In the last scene, Duvall had shrunk down to 3 inches tall, and joined the pretty lady in the doll house.