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)

Klee Bragger

Digger Sam (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)

Ryan O'Donohue

Digger Dave / Randall (voice)

Patricia Renna

(voice)

Justin Shenkarow

Gelman (voice)

Michael Shulman

Francis the Hustler Kid (voice)

Francesca Marie Smith

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

Aaron Spann

(voice)

Kath Soucie

Hector / Cindy / Gus's Mom (voice)

Tara Strong

Spinelli's Doll (voice)

Erik von Detten

Erwin Lawson (voice)

David Berry

(voice)