Mr. Harris (voice) (as Ed Asner)

Miles' Mom (voice)

Randy (voice)

Martin at Age 12 (voice)

Martin at Age 26 (voice) (as Levar Burton)

Maria (voice)

Train Conductor (voice)

Mrs. Peck (voice)

Turner (voice)

Daddy King (voice)

Mrs. Dale (voice)

Mr. Willis (voice)

Kyle's Dad (voice)

Martin at Age 15 (voice)

Mrs. Clark (voice)

Coretta Scott King (voice)

Bull Connor / Chihuahua (voice)

Christine King (voice)

Martin - Age 34 (voice) (as Dexter Scott King)

Kyle (voice)

Miles (voice)

Sam Dale (voice)

Reporter #1 / Demonstrator (voice)

Reporter #2 / Demonstrator (voice)

Man / Demonstrator (voice)