Spencer Breslin (Harold Clemens)
Cuba Gooding, Jr. (Cromer)
Nikki Blonsky (Rhonda)
Ally Sheedy (Maureen Clemens)
Fred Willard (Dr. Pratt)
Robert Gorrie (Patrick)
Dan Dietz Farcher (Brad)
Elizabeth Gillies (Evelyn Taylor)
Kate Hodge (Dusty)
Angel Sing (Chang)
Christina Jackson (Traci)
William Wiggins (Vince)
Jake Sokoloff (Byron)
Alan Aisenberg (Malcolm)
Samantha Futerman (Katy)
Edward Gelbinovich (Derek)
Derrick Nelson (Mason)
Nohman Sakhi (Jugdish)
Evan Daves (Dennis)
Lou Wagner (Principal Nelson)
Jim Downy (Mr. Pinchot)
Nicola Peltz (Becky)
Julian Mazzola (Kid)
Michelle Fields (Michelle)
Lorraine Mazzola (Teacher)
Judy Nazemetz (Nurse)
Jill Weigand (Waitress)
Meredith Ann Bull (Belinda)
Nicky Katt (Cop #1)
Kid Million (Cop #2)
Pat Shannon (Rhonda's Dad)
Sarge Pickman (Alibi Club DJ)
Wass W. Stevens (Prisoner)
Dave Attell (Barker)
Judith Knight Young (Lunch Lady)
Joey Blonsky (Malcolm)
Chris Parnell (Coach Vanderpool)
Rachel Dratch (Mrs. Norris)
Colin Quinn (Redy)
Stella Maeve (Shelly Clemens)
Suzanne Shepherd (Maude Sellers)