He played the childlike C.W. Moss in Bonnie and Clyde. His roles in House of 1000 corpses and Ray Bradbury Theater brought him additional fame.
He attended the prestigious Actors' Studio in New York.
He played Homer McCauley in an adaptation of The Human Comedy by William Saroyan.
He got married to actress Beth Howland in Novemer 1961 and they separated in 1969.