Full cast of Hey Arnold!
Grandpa Phil (voice) / Grandpa Phil / Cop #1 (voice) / Delivery Man (voice) / Grandpa Phil / Grandpa Phil's Father / Jolly Olly Man (voice) / Animal Control Officer (voice) / Grandpa Phil / Chicken Man (voice) / Grandpa Phil / Nick Vermicelli (voice) / Grandpa Phil / Judge (voice) / Big Arnold (voice) / Grandpa Phil / Nolo (voice) / Nick Vermicelli (voice) / Grandpa Phil / Reporter (voice)
163 episodes
Harold Berman (voice) / Harold Berman(voice) / Harold Berman / Iggy (voice) / Harold Berman / Boy on Bicycle (voice) / Harold Berman / Robert (voice) / Harold Berman (voice; uncredited) / Joey (voice)
149 episodes
Phoebe Heyerdahl (voice) / Phoebe Heyerdahl / Clerk (voice) / Phoebe Heyerdahl / Italian Girl / French Girl (voice) / Phoebe Heyerdahl / Woman (voice) / Phoebe Heyerdahl / Joy (voice) / Phoebe Heyerdahl / Ruth P. McDougal (voice) / Phoebe Heyerdahl / Worker #2 (voice) / Phoebe Heyerdahl / Kid #2 / Patrice (voice) / Phoebe Heyerdahl / Girl (voice)
111 episodes
Christopher Walberg
Stinky Peterson (voice) / Stinky Peterson / Kyle (voice) / Stinky Peterson (voice; uncredited) / Stinky Peterson / Bratty Kid #1 (voice) / Stinky (voice)
89 episodes
Phillip Van Dyke
Arnold (voice) / Ludwig (voice)
76 episodes
Lane Toran
Arnold (voice) / Wolfgang (voice) / Arnold (singing voice) / Wolfgang / French Boy (voice)
56 episodes
Sam Gifaldi
Sid (voice) / Sid / Robert (voice) / Billy (voice)
48 episodes
Blake McIver Ewing
Eugene Horowitz (voice)
42 episodes
Craig Bartlett
Brainy (voice) / Brainy (voice; uncredited) / DJ (voice) / Brainy / DJ (voice) / Nashville Ned / Customer #1 (voice) / Chester (voice) / Movie Man / Steve (voice) / Brainy / Mr. Packenham (voice) / Brainy / Steel Mill Worker (voice) / Monkeyman (voice; uncredited) / Brainy / Paper Boy (voice) / Cabbie / Party Clown (voice) / Abner (voice) / Brainy / Astronaut / Stockbroker (voice) / Father (voice) / Mop Guy (voice) / Big Man (voice) / Arnold's Father (voice) / Minister (voice)
42 episodes
Grandma Gertie (voice) / Miss Slovak (voice) / Grandma Gertie / Interviewer #2 (voice) / Grandma Gertie / Arnold's Mother (voice) / Grandma Gertie / Harold's Aunt (voice) / Grandma Gertie / Iggy / Joey (voice) / Grandma Gertie / Miss Slovak (voice) / Grandma Gertie / Mayor Dixie (voice) / Movie Woman (voice)
33 episodes
Miriam Pataki (voice) / Mrs. Berman (voice) / Hillary / Martha (voice) / Mrs. Berman / Mrs. Ryle (voice) / Miriam Pataki / Woman (voice) / Mrs. Berman / Danny (voice) / Mrs. Berman / Miriam Pataki (voice) / Miriam Pataki / Nancy Woman (voice) / Cecile (voice) / Mariam Pataki (voice) / Mrs. Vitello (voice) / Miriam Pataki / Yolanda (voice) / Lunch Lady (voice) / Agent (voice)
28 episodes
Steve Viksten
Oskar Kokoshka (voice) / Oskar Kokoshka / Stagehand (voice) / Italian Boy (voice) / Oskar Kokoshka / Smitty (voice) / Caesar (voice; uncredited) / Oskar Kokoshka / Caesar (voice) / Oskar Kokoshka / Casa Paradiso Spokesman (voice) / Oskar Kokoshka / Caesar (voice; uncredited) / Oskar Kokoshka / Burt (voice) / Oskar Kokoshka / Cop #2 (voice)
27 episodes
Big Bob Pataki (voice) / Cecile's Dad / Jacques (voice) / Big Bob Pataki / Moderator (voice) / Big Bob Pataki / Organ Grinder (voice) / Big Bob Pataki / Douglas Cain (voice) / Big Bob Pataki / Clerk (voice) / Abner (voice) / Big Bob Pataki / Uncle Chuck (voice) / Big Bob Pataki / Mechanic (voice) / Maurice / Director (voice) / Stinky's Father / Stinky's Grandpa (voice) / Big Bob Pataki / TV Man (voice) / Revis (voice)
27 episodes
Ernie Potts (voice) / Stinky's Father (voice) / Ernie Potts / Paper Man (voice) / Ernie Potts / Old Man (voice) / Guard / Mr. Feltz (voice)
24 episodes
Dan Butler
Mr. Simmons (voice) / Mr. Simmons (voice; uncredited) / Mr. Simmons / Publisher (voice) / Mr. Simmons / Scientist (voice) / Mr. Simmons / Dispatcher (voice) / Mr. Simmons / Lila's Father (voice) / Mr. Simmons / Houseboy (voice)
24 episodes
David Wohl
Principal Wartz (voice) / Mr. Berman (voice) / Principal Wartz / Bad Guy (voice) / Principal Wartz / Announcer (voice) / Mr. Berman / Bus Driver (voice)
21 episodes
Baoan Coleman
Mr. Hyunh (voice) / Oskar Kokoshka (voice)
18 episodes
Mr. Green (voice) / Mr. Green / Judge (voice) / Mr. Green (voice; uncredited) / Hospital Orderly (voice) / Mr. Green / EBN Announcer (voice)
14 episodes
Adam Wylie
Curly Gammelthorpe (voice)
14 episodes
Lou Rawls
Harvey (voice) / Harvey / Bus Driver (voice) / Harvey / Pop Daddy (voice) / Harvey (voice; uncredited)
12 episodes
Christopher Castile
Eugene Horowitz (voice) / Eugene Horowitz / Robert (voice)
9 episodes
Mary Scheer
Suzie Kokoshka (voice) / Suzie Kokoshka / Interviewer #1 (voice)
9 episodes
Danica Ivancevic
Mother / Woman (voice; uncredited) / Librarian (voice) / Officer Pudney (voice) / Flight Attendant (voice) / Receptionist (voice) / Sabrina (voice)
6 episodes
Lauren Robinson
Nadine (voice)
5 episodes
Marcus Toji
Park (voice) / Park / Third Grader (voice) / Park / Iggy (voice)
5 episodes
Rick Fitts
Mr. Johanssen (voice)
5 episodes
Avriel Epps
Timberly Johanssen (voice)
5 episodes
Jordan Warkol
Chocolate Boy (voice) / Chocolate Boy / Jamie (voice)
5 episodes
John Mariano
Vic / Morrie (voice) / Zamboni Jones / Banana Guy / Shady Guy (voice)
4 episodes
Shari Belafonte
Mrs. Johanssen (voice)
4 episodes
Michael Bacall
Torvald (voice) / Tommy (voice) / Tony (voice)
4 episodes
Joey Paul Jensen
Woman on Street (voice) / Mindy / Mrs. Uberman (voice) / Seymour's Mother (voice) / Woman (voice)
4 episodes
Jarrett Lennon
Eugene Horowitz (voice)
4 episodes
Tony Jay
Rex Smythe-Higgins (voice) / Dr. Lipman (voice) / Booming Voice (voice)
4 episodes
Ashley Buccille
Lila Sawyer (voice)
4 episodes
Tim Wiley
Edmund (voice) / Edmund / Fifth Grader #2 (voice)
4 episodes
Rick Corso
Dino Spumoni (voice)
3 episodes
Iggy's Mother (voice) / Mayor Dixie / Stinky's Grandma (voice) / Mayor Dixie (voice)
3 episodes
Frank Martorana
Thug / Teen #3 (voice) / Burt (voice)
2 episodes
Vincent Schiavelli
Pigeon Man (voice) / Mr. Bailey (voice)
2 episodes
Caroline Aaron
Landlady (voice) / Moderator (voice)
2 episodes
Billy Riback
Announcer / PSA Guy (voice) / TV Reporter / Announcer (voice)
2 episodes
Elliott Gould
Rabbi Goldberg (voice)
2 episodes
Cathy Moriarty
Tish Wittenberg (voice)
2 episodes
Joey Stinson
Rex Smythe-Higgins III (voice)
2 episodes
Mary Gross
Nurse / Actress (voice) / Shelley (voice)
2 episodes
Victor Samuel Lopez
Lorenzo (voice)
2 episodes
Henry Gibson
1 episode
Fred Willard
1 episode
Pat Corley
1 episode
Zelda Rubinstein
1 episode
Georgia Engel
1 episode
Kathie Lee Gifford
1 episode
Michael Levin
Ray Doppel (voice)
1 episode
Steven Hartman
Curly (voice)
1 episode
Pamela Hayden
Connie (voice)
1 episode
Jim Lang
The Mad Engineer (voice)
1 episode
Danny Strong
Teen #1 / Teen #2 (voice)
1 episode
Hiep Thi Le
Mai Hyunh (voice)
1 episode
Grant Gelt
Tucker Wittenberg (voice)
1 episode
DeeDee Rescher
Torvald's Mother (voice)
1 episode
Ben Aaron
Jamie O Johanssen (voice)
1 episode
Joe Purdy
Mr. Purdy (voice; uncredited)
1 episode
Angie Jaree
Big Bob Jingle Singer (voice)
1 episode
Michael Fishman
Joey Stevenson (voice)
1 episode
Lloyd Sherr
Berlitz Teacher / Stylist (voice)
1 episode
Jimmy Peterson
Teenage Bully (voice)
1 episode
Alan Paul
Dino Spumoni (singing voice)
1 episode
John Garry
Lieutenant Major Goose (voice)
1 episode
Marty York
Mickey the Weasel / Fifth Grader #1 (voice)
1 episode
John Rubano
Sherm (voice)
1 episode
Jamie Farr
Mr. Wacko (voice)
1 episode
Jer Adrianne Lelliott
Little Kid (voice)
1 episode
Randy Travis
Travis Randall / Mr. Hyunh's Singing (voice)
1 episode
Hari Oziol
Boy in Crowd (voice)
1 episode
Wendy Hammers
Jackie Lee (voice)
1 episode
Christian Mena
Ronnie Matthews (singing voice)
1 episode
Steve Fitzpatrick
Floyd / Slim (voice)
1 episode
Mitzi McCall
Pearl Simmons (voice)
1 episode
Jessica Sodd
Marcy (voice)
1 episode
Josh Ryan Evans
3rd Grader (voice)
1 episode
Kyle Gibson
Crony (voice)
1 episode
Cameron Van Hoy
Big Gino (voice)
1 episode
Phyllis Diller
Mitzi
1 episode