Kenan Thompson as Fat Albert

Kyla Pratt as Doris Robertson

Dania Ramirez as Lauri Robertson

Shedrack Anderson III as Rudolph "Rudy" Davis

Jermaine Williams as James "Mushmouth" Mush

Keith D. Robinson as William Henry "Bill" Cosby Jr.

Marques Houston as "Dumb" Donald Parker

Aaron Frazier as "Old Weird" Harold Simmons

Bill Cosby as Self

Omarion as Reggie

Keri Lynn Pratt as Heather

Alice Greczyn as Becky

Dylan Cash as Emmitt

Alphonso McAuley as Bucky Miller

Aaron Carter as Teen

J. Mack Slaughter as Arthur

Nick Zano as Camera Salesman

Annie Abbott as Mrs. Forchick

Rick Overton as Coach Gillespie

Fonzworth Bentley as Salesman

Jeff Leaf as Basketball Player

Jeanne Chinn as Woman #1

Raven-Symoné as Danielle (voice)

Ben Diskin as Teen #2 (voice)

Catero Colbert as Lead Teen (voice)

Michael Franklin as Dancer

Jeff Harlan as Dad

Cody Fleetwood as Kid

Jenifer Yeuroukis as Woman #2

Alyssa Shafer as Little Girl

Damon Elliott as DJ

Jeremy Suarez as Russell (voice)

Earl Billings as Mr. Mudfoot (voice)

Charles Duckworth as Teen #1 (voice)

Jeff Garlin as Jer

Monica Allison as Additional Voices (voice)

Joe Koons as Hero - Track Star (uncredited)