Myles Jeffrey
T.J. Detweiler (voice)

Pamela Adlon
Spinelli (voice)

Dabney Coleman
Principal Prickley (voice)

Ashley Johnson
Gretchen Grundler (voice)

Allyce Beasley
Miss Grotke (voice)

Rickey D'Shon Collins
Vince LaSalle (voice)

Jason Davis
Mikey Blumberg (voice)

Courtland Mead
Gus Griswald (voice)

Andrew Lawrence
Younger T.J. (voice)

Lane Toran
King Bob (voice)

April Winchell
Miss Finster (voice)

Rachel Crane
Ashley Q (voice)

Ross Malinger
Older T.J. (voice)

Danny Cooksey
(voice)

Jane Curtin
(voice)

Aria Noelle Curzon
Cornchip Girl (voice)

E. G. Daily
Digger #1 (voice)

Miles Marsico
(voice)

Anndi McAfee
Ashley A (voice)

Sam McMurray
Lt. Griswald (voice)

Justin Shenkarow
Gelman (voice)

Michael Shulman
Francis the Hustler Kid (voice)

Francesca Marie Smith
Upside-Down Girl / Ashley T / Swinger Girl (voice)

Kath Soucie
Hector / Cindy / Gus's Mom (voice)

Tara Strong
Spinelli's Doll (voice)

Erik von Detten
Erwin Lawson (voice)