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)