Will Geer (born William Aughe Ghere) was an American actor, musician, and social activist, who was active in labor organizing and other movements in New York and Southern California in the 1930s and 1940s. In California he befriended rising singer Woody Guthrie. They both lived in New York for a time in the 1940s. He was blacklisted in the 1950s, by Hollywood, after refusing, in testimony before Congress, to name persons who had joined the Communist Party. Geer acted on stage in New York and eastern theatres, and in California for film. He is best-known as an actor for his later portrayal of Grandpa Zebulon Tyler Walton in the 1970s TV series The Waltons.