Richard Thomas John Boy Walton Actor, Director Ralph Waite John Walton Actor, Director 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 Joe Conley Ike Godsey Actor Ronnie Claire Edwards Corabeth Godsey Actor Robert Donner Guest Star Mary Jackson Emily Baldwin Actor John Crawford Sheriff Ep Bridges Actor Nora Marlowe Guest Star Helen Kleeb Mamie Baldwin Actor Tom Bower Guest Star John Ritter Guest Star Lee Rich Executive Producer Earl Hamner Jr. Executive Producer Andy White Producer Harry Harris Director Larry Dobkin Director Walter Alzmann Director Harvey Laidman Director Ralph Senensky Director Tony Brand Director