Hey Arnold!

Spencer Klein

Arnold (voice)

Francesca Marie Smith

Helga Pataki (voice)

Jamil Walker Smith

Gerald Johanssen (voice)

Blake McIver Ewing

Eugene Horowitz (voice)

Olivia Hack

Rhonda Wellington Lloyd (voice)

Dan Castellaneta

Grandpa Phil (voice)

Justin Shenkarow

Harold Berman (voice)

Phillip Van Dyke

Arnold (voice)

Anndi McAfee

Phoebe Heyerdahl (voice)

Lane Toran

Arnold (voice)

Christopher Walberg

Stinky Peterson (voice)

Michael Welch

Acting

Haley Joel Osment

Acting

Jess Harnell

Acting

Jeremy Suarez

Acting

Henry Gibson

Acting

Jack Angel

Acting

Andy Dick

Monkeyman (voice)