Keith David
Narrator (voice)
Kevin Conway
Mark Twain (voice)
Blythe Danner
Olivia "Livy" Langdon Clemens (voice)
Philip Bosco
(voice)
Tim Clark
(voice)
Carolyn McCormick
(voice)
Amy Madigan
(voice)
Cynthia Nixon
(voice)
John Boyer
Self (uncredited)
Jocelyn Chadwick
Self (uncredited)
Shelly Fisher Fishkin
Self (uncredited)
Dick Gregory
Self (uncredited)
Hal Holbrook
Self (uncredited)
Arthur Miller
Self (uncredited)
Chuck Jones
Self (uncredited)
Ron Powers
Self (uncredited)
Laura Skandera-Trombley
Self (uncredited)
William Styron
Self (uncredited)