Earl Hamner Jr. Creator, Writer Richard Thomas John Boy Walton Actor Ralph Waite John Walton Actor Michael Learned Olivia Walton Actor Will Geer Zeb "Grandpa" Walton Actor Ellen Corby Esther "Grandma" Walton Actor Judy Norton Mary Ellen Walton Willard Actor Jon Walmsley Jason Walton Actor Mary Beth McDonough Erin Walton Actor Eric Scott Ben Walton Actor David W. Harper Jim-Bob Walton Actor Kami Cotler Elizabeth Walton Actor Mary Jackson Emily Baldwin Actor Helen Kleeb Mamie Baldwin Actor John Crawford Sheriff Ep Bridges Actor John Ritter Rev. Matthew Fordwick Guest Star Don Collier Dr. Miller Guest Star Victor Izay Dr. Matthew Vance Guest Star David Doremus G.W. Haines Guest Star Joseph Bernard Snyder Guest Star Ann Carol Pearson Admissions Clerk Guest Star Joe Frank Carollo Tom Guest Star Merv Adelson Executive Producer Lee Rich Executive Producer Robert L. Jacks Producer Philip Leacock Director