© 2026 The Couch Critic
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"Adventure is never more than a bus stop away."
The daily life of Arnold--a fourth-grader with a wild imagination, street smarts and a head shaped like a football.
138 Cast Members
Francesca Marie Smith
Helga Pataki (voice)
186 Episodes
Jamil Walker Smith
Gerald Johanssen (voice)
186 Episodes
Dan Castellaneta
Grandpa Phil (voice)
152 Episodes
Justin Shenkarow
Harold Berman (voice)
107 Episodes
Anndi McAfee
Phoebe Heyerdahl (voice)
102 Episodes
Christopher Walberg
Stinky Peterson (voice)
84 Episodes
Phillip Van Dyke
Arnold (voice)
75 Episodes
Spencer Klein
Arnold (voice)
73 Episodes
Olivia Hack
Rhonda Wellington Lloyd (voice)
65 Episodes
Lane Toran
Arnold (voice)
50 Episodes
Sam Gifaldi
Sid (voice)
46 Episodes
Blake McIver Ewing
Eugene Horowitz (voice)
42 Episodes
Craig Bartlett
Brainy (voice)
15 Episodes
Tress MacNeille
Grandma Gertie (voice)
20 Episodes
Kath Soucie
Miriam Pataki (voice)
14 Episodes
Steve Viksten
Oskar Kokoshka (voice)
18 Episodes
Maurice LaMarche
Big Bob Pataki (voice)
15 Episodes
Dom Irrera
Ernie Potts (voice)
20 Episodes
Dan Butler
Mr. Simmons (voice)
17 Episodes
David Wohl
Principal Wartz (voice)
14 Episodes
