Myles Jeffrey

Character: T.J. Detweiler (voice)

Pamela Adlon

Character: Spinelli (voice)

Dabney Coleman

Character: Principal Prickley (voice)

Ashley Johnson

Character: Gretchen Grundler (voice)

Allyce Beasley

Character: Miss Grotke (voice)

Rickey D'Shon Collins

Character: Vince LaSalle (voice)

Jason Davis

Character: Mikey Blumberg (voice)

Courtland Mead

Character: Gus Griswald (voice)

Andrew Lawrence

Character: Younger T.J. (voice)

Lane Toran

Character: King Bob (voice)

Klee Bragger

Character: Digger Sam (voice)

April Winchell

Character: Miss Finster (voice)

Rachel Crane

Character: Ashley Q (voice)

Ross Malinger

Character: Older T.J. (voice)

Danny Cooksey

Character: (voice)

Jane Curtin

Character: (voice)

Aria Noelle Curzon

Character: Cornchip Girl (voice)

E. G. Daily

Character: Digger #1 (voice)

Miles Marsico

Character: (voice)

Anndi McAfee

Character: Ashley A (voice)

Sam McMurray

Character: Lt. Griswald (voice)

Ryan O'Donohue

Character: Digger Dave / Randall (voice)

Patricia Renna

Character: (voice)

Justin Shenkarow

Character: Gelman (voice)

Michael Shulman

Character: Francis the Hustler Kid (voice)

Francesca Marie Smith

Character: Upside-Down Girl / Ashley T / Swinger Girl (voice)

Aaron Spann

Character: (voice)

Kath Soucie

Character: Hector / Cindy / Gus's Mom (voice)

Tara Strong

Character: Spinelli's Doll (voice)

Erik von Detten

Character: Erwin Lawson (voice)

David Berry

Character: (voice)