Ed Asner

as Mr. Harris (voice)

Angela Bassett

as Miles' Mom (voice)

Lucas Black

as Randy (voice)

Theodore Borders

as Martin at Age 12 (voice)

LeVar Burton

as Martin at Age 26 (voice)

Jessica Garcia

as Maria (voice)

Danny Glover

as Train Conductor (voice)

Whoopi Goldberg

as Mrs. Peck (voice)

Samuel L. Jackson

as Turner (voice)

James Earl Jones

as Daddy King (voice)

Ashley Judd

as Mrs. Dale (voice)

Richard Kind

as Mr. Willis (voice)

John Travolta

as Kyle's Dad (voice)

Jaleel White

as Martin at Age 15 (voice)

Susan Sarandon

as Mrs. Clark (voice)

Oprah Winfrey

as Coretta Scott King (voice)

Frank Welker

as Bull Connor / Chihuahua (voice)

Yolanda King

as Christine King (voice)

Dexter King

as Martin - Age 34 (voice)

Zachary Leigh

as Kyle (voice)

Robert Ri'chard

as Miles (voice)

Adam Wylie

as Sam Dale (voice)

Jess Harnell

as Reporter #1 / Demonstrator (voice)

Joe Lala

as Reporter #2 / Demonstrator (voice)

John Wesley

as Man / Demonstrator (voice)

Elizabeth Primm

as Old Woman / Demonstrator (voice)

Jodi Carlisle