Arnold (voice)

Spencer Klein

Helga Geraldine Pataki (voice)

Francesca Smith

Helga Geraldine Pataki (voice)

Francesca Marie Smith

Gerald, Rasta Guy

Jamil Walker Smith

Grandpa/Nick

Dan Castellaneta

Grandma Gertie 'Pookie'

Tress MacNeille

Scheck (voice)

Paul Sorvino

Bridget

Jennifer Jason Leigh

City Coroner

Christopher Lloyd

Mr. Bailey

Vincent Schiavelli

Big Bob Pataki / Head of Security

Maurice LaMarche

Miriam Pataki / Mona / Reporter (voice)

Kath Soucie

Stinky Peterson

Christopher P. Walberg

Sid (voice)

Sam Gifaldi

Mrs. Vitello (voice)

Elizabeth Ashley

Harold Berman (voice)

Justin Shenkarow

Monkeyman (voice)

Craig Bartlett

Eugene Horowitz (voice)

Blake McIver Ewing

Rhonda Wellington Lloyd (voice)

Olivia Hack

Phoebe Heyerdahl (voice)

Anndi McAfee

Marty Green / Riot Cop (voice)

James Keane

Ray Doppel (voice)

Michael Levin

Oskar Kokoshka (voice)

Steve Viksten

Ernie Potts (voice)

Dom Irrera

Mr. Hyunh (voice)

Baoan Coleman