Spencer Klein

Arnold (voice)

Francesca Marie Smith

Helga Geraldine Pataki (voice)

Jamil Walker Smith

Gerald Johanssen / Rasta Guy (voice)

Dan Castellaneta

Grandpa 'Steely' Phil / Nick Vermicelli (voice)

Tress MacNeille

Grandma Gertie 'Pookie' / Mayor Dixie / Red (voice)

Paul Sorvino

Scheck (voice)

Jennifer Jason Leigh

Bridget (voice)

Christopher Lloyd

Coroner (voice)

Vincent Schiavelli

Mr. Bailey (voice)

Maurice LaMarche

Big Bob Pataki / Head of Security (voice)

Kath Soucie

Miriam Pataki / Mona / Reporter (voice)

Justin Shenkarow

Harold Berman (voice)

Blake McIver Ewing

Eugene Horowitz (voice)

Olivia Hack

Rhonda Wellington Lloyd (voice)

Anndi McAfee

Phoebe Heyerdahl (voice)

James Keane

Marty Green / Riot Cop (voice)

Elizabeth Ashley

Mrs. Vitello (voice)

Dom Irrera

Ernie Potts (voice)

Baoan Coleman

Mr. Hyunh (voice)

Craig Bartlett

Monkeyman (voice)