Spencer Klein
Arnold (voice)
Cast
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)
