Michael McKean
Mr. Bream (voice)
Courtland Mead
Gustav Patten 'Gus' Griswald (voice)
Ashley Johnson
Gretchen Grundler (voice)
Jason Davis
Mikey Blumberg (voice)
James Earl Jones
Mister (voice)
Rickey D'Shon Collins
Vincent Pierre 'Vince' LaSalle (voice)
Andrew Lawrence
Theodore J. 'T.J.' Detweiler (voice)
Bobbi Page
Chorus (singing voice) (uncredited)
Ross Malinger
T.J. Detweiler (archive sound)
Pamela Adlon
Ashley Spinelli
Allyce Beasley
Miss Alordayne Grotkey
April Winchell
Miss Muriel P Finster
Dabney Coleman
Principal Peter Prickly
Gregg Berger
Robotic Santa/TV Editor/Astronaut
