Andrew Lawrence
T.J. Detweiler (voice)
Rickey D'Shon Collins
Vince La Salle (voice)
Pamela Adlon
Spinelli (voice)
Ashley Johnson
Gretchen Grundler (voice)
Jason Davis
Mikey Blumberg (voice)
Courtland Mead
Gus Griswald (voice)
April Winchell
Ms. Finster / Mrs. Detweiller (voice)
Dabney Coleman
Principal Peter Prickly (voice)
Ryan O'Donohue
Digger Dave / Randall (voice)
Robert Goulet
Mikey's Singing Voice (voice)
Melissa Joan Hart
Becky (voice)
Peter MacNicol
Fenwick (voice)
Tony Jay
Dr. Rosenthal (voice)
James Woods
Dr. Phillium Benedict (voice)
