Hey Arnold!

Francesca Marie Smith

Helga Pataki (voice)

186 eps.

Jamil Walker Smith

Gerald Johanssen (voice)

186 eps.

Dan Castellaneta

Grandpa Phil / Grandpa Phil's Father / Jolly Olly Man (voice) / Nick Vermicelli (voice) / Grandpa Phil (voice) / Grandpa Phil / Reporter (voice) / Grandpa Phil / Cop #1 (voice) / Delivery Man (voice) / Grandpa Phil / Nick Vermicelli (voice) / Grandpa Phil / Chicken Man (voice) / Grandpa Phil / Nolo (voice) / Grandpa Phil / Judge (voice) / Animal Control Officer (voice) / Big Arnold (voice)

152 eps.

Justin Shenkarow

Harold Berman / Robert (voice) / Harold Berman (voice) / Harold Berman (voice; uncredited) / Harold Berman(voice) / Harold Berman / Iggy (voice) / Harold Berman / Boy on Bicycle (voice) / Joey (voice)

144 eps.

Anndi McAfee

Phoebe Heyerdahl (voice) / Phoebe Heyerdahl / Joy (voice) / Phoebe Heyerdahl / Clerk (voice) / Phoebe Heyerdahl / Woman (voice) / Phoebe Heyerdahl / Kid #2 / Phoebe Heyerdahl / Girl (voice) / Phoebe Heyerdahl / Ruth P. McDougal (voice) / Patrice (voice) / Phoebe Heyerdahl / Worker #2 (voice) / Phoebe Heyerdahl / Italian Girl / French Girl (voice)

102 eps.

Christopher Walberg

Stinky Peterson (voice) / Stinky Peterson / Bratty Kid #1 (voice) / Stinky Peterson (voice; uncredited) / Stinky (voice) / Stinky Peterson / Kyle (voice)

85 eps.

Phillip Van Dyke

Arnold (voice) / Ludwig (voice)

76 eps.

Spencer Klein

Arnold (voice)

73 eps.

Olivia Hack

Rhonda Wellington Lloyd (voice) / Rhonda Wellington Lloyd / Mary (voice)

65 eps.

Lane Toran

Wolfgang (voice) / Arnold (singing voice) / Arnold (voice) / Wolfgang / French Boy (voice)

50 eps.

Sam Gifaldi

Sid (voice) / Billy (voice) / Sid / Robert (voice)

48 eps.

Blake McIver Ewing

Eugene Horowitz (voice)

42 eps.