The daily life of Arnold--a fourth-grader with a wild imagination, street smarts and a head shaped like a football.
Spencer Klein
as Arnold (voice)
Francesca Marie Smith
as Helga Pataki (voice)
Jamil Walker Smith
as Gerald Johanssen (voice)
Olivia Hack
as Rhonda Wellington Lloyd (voice)
Anndi McAfee
as Phoebe Heyerdahl (voice)
Justin Shenkarow
as Harold Berman (voice)
Blake McIver Ewing
as Eugene Horowitz (voice)
Dan Castellaneta
as Grandpa Phil (voice)
