Fat Albert

Kenan Thompson

Doris Robertson

Kyla Pratt

Rudolph "Rudy" Davis

Shedrack Anderson III

Lauri Robertson

Dania Ramirez

James "Mushmouth" Mush

Jermaine Williams

Bill

Keith Robinson

Bucky

Alphonso McAuley

"Old Weird" Harold Simmons

Aaron Frazier

"Dumb" Donald Parker

Marques Houston

Bill Cosby

Bill Cosby

Reggie

Omari Grandberry

Heather

Keri Lynn Pratt

Arthur

J. Mack Slaughter Jr.

Becky

Alice Greczyn

Salesman

Farnsworth Bentley

Emmitt

Dylan Cash

Russell (voice)

Jeremy Suarez

Teen

Aaron Carter

Danielle

Raven-Symone

Camera Salesman

Nick Zano

Mrs. Forchick

Annie Abbott

Coach Gillespie

Rick Overton

Basketball Player

Jeff Leaf

Kid

Cody Fleetwood

Woman #1

Jeanne Chinn

Russell

Russell Cosby

Teen #2 (Voice)

Ben Diskin

Lead Teen (Voice)

Catero Colbert

Dancer

Michael Franklin

Dad

Jeff Harlan

Woman #2

Jenifer Yeuroukis

Little Girl

Alyssa Shafer

DJ

Damon Elliott

Mr. Mudfoot (Voice)

Earl Billings

Teen #1 (voice)

Charles Duckworth

Jer

Jeff Garlin

Additional Voices (voice)

Monica Allison

Hero - Track Star (uncredited)

Joe Koons

Teen #3 (Voice)

Josh Uhler