Ed Asner

Mr. Harris (voice) (as Ed Asner)

Angela Bassett

Miles' Mom (voice)

Lucas Black

Randy (voice)

Theodore Borders

Martin at Age 12 (voice)

LeVar Burton

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

Danny Glover

Train Conductor (voice)

Whoopi Goldberg

Mrs. Peck (voice)

Samuel L. Jackson

Turner (voice)

James Earl Jones

Daddy King (voice)

Ashley Judd

Mrs. Dale (voice)

Richard Kind

Mr. Willis (voice)

John Travolta

Kyle's Dad (voice)

Jaleel White

Martin at Age 15 (voice)

Susan Sarandon

Mrs. Clark (voice)

Oprah Winfrey

Coretta Scott King (voice)

Frank Welker

Bull Connor / Chihuahua (voice)

Yolanda King

Christine King (voice)

Robert Ri'chard

Miles (voice)

Adam Wylie

Sam Dale (voice)

Jess Harnell

Reporter #1 / Demonstrator (voice)

Joe Lala

Reporter #2 / Demonstrator (voice)

John Wesley

Man / Demonstrator (voice)

Jodi Carlisle