Hey Arnold!

Spencer Klein

Arnold (voice)

Francesca Marie Smith

Helga Pataki (voice)

Jamil Walker Smith

Gerald Johanssen (voice)

Blake McIver Ewing

Eugene Horowitz (voice)

Olivia Hack

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

Phillip Van Dyke

Arnold (voice), Ludwig (voice)

Justin Shenkarow

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

Lane Toran

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

Dan Castellaneta

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

Anndi McAfee

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

Michael Welch

Haley Joel Osment

Jess Harnell

Jeremy Suarez

Henry Gibson

Jack Angel

Andy Dick

Monkeyman (voice)

Fred Willard

Pat Corley

Mayim Bialik

Maria (voice)

Zelda Rubinstein

Georgia Engel

Michael McKean

Kathie Lee Gifford

Elizabeth Ashley

Mrs. Vitello (voice)

Brian Doyle-Murray

Lasombra

Davy Jones

Himself

Christopher Castile

Eugene Horowitz (voice), Eugene Horowitz / Robert (voice)

John Mariano

Vic / Morrie (voice), Zamboni Jones / Banana Guy / Shady Guy (voice)

Danny Cooksey

Stoop Kid (voice)

Shari Belafonte

Mrs. Johanssen (voice)

Pamela Hayden

Connie (voice)

Michael Donovan

Maria's Dad / Cabby (voice)

Ben Diskin

Eugene Horowitz / Kid (voice), Eugene Horowitz (voice)

Quinton Flynn

Man #1 (voice)

Christine Ebersole

Lana Vail (voice)

James Keane

Mr. Green / Judge (voice), Mr. Green / EBN Announcer (voice), Mr. Green (voice; uncredited), Hospital Orderly (voice), Mr. Green (voice)

Danny Strong

Teen #1 / Teen #2 (voice)

Adam Wylie

Curly Gammelthorpe (voice)

Hiep Thi Le

Mai Hyunh (voice)

Jim Belushi

Coach Wittenberg (voice)

Grant Gelt

Tucker Wittenberg (voice)

Marcus Toji

Park (voice), Park / Third Grader (voice), Park / Iggy (voice)

Lou Rawls

Harvey (voice; uncredited), Harvey / Pop Daddy (voice), Harvey / Bus Driver (voice), Harvey (voice)

Max Casella

Tony B. / Philly D. (voice)

Michael Bacall

Tony (voice), Torvald (voice), Tommy (voice)

Tress MacNeille

Miss Slovak (voice), Grandma Gertie / Mayor Dixie (voice), Movie Woman (voice), Grandma Gertie / Iggy / Joey (voice), Grandma Gertie / Harold's Aunt (voice), Grandma Gertie / Arnold's Mother (voice), Grandma Gertie (voice), Grandma Gertie / Miss Slovak (voice), Grandma Gertie / Interviewer #2 (voice)

Kevin Michael Richardson

Blind Man / Newscaster (voice)

Mark Hamill

Grubby (voice), Cop (voice)

Vincent Schiavelli

Mr. Bailey (voice), Pigeon Man (voice)

Caroline Aaron

Landlady (voice), Moderator (voice)

DeeDee Rescher

Torvald's Mother (voice)

Rick Fitts

Mr. Johanssen (voice)

Carlos Alazraqui

Frankie G. / Chas (voice), Nigel / Man (voice), Minion (voice)

Ben Aaron

Jamie O Johanssen (voice)

Mary Scheer

Suzie Kokoshka (voice), Suzie Kokoshka / Interviewer #1 (voice)

Michael Fishman

Joey Stevenson (voice)

Joey Paul Jensen

Woman (voice), Seymour's Mother (voice), Mindy / Mrs. Uberman (voice), Woman on Street (voice)

David L. Lander

Sam the Sewer King (voice)

Jarrett Lennon

Eugene Horowitz (voice)

Baoan Coleman

Mr. Hyunh (voice), Oskar Kokoshka (voice)

Dom Irrera

Stinky's Father (voice), Ernie Potts / Old Man (voice), Ernie Potts / Paper Man (voice), Ernie Potts (voice), Guard / Mr. Feltz (voice)

Lacey Chabert

Ruth P. McDougal (voice)

Lloyd Sherr

Berlitz Teacher / Stylist (voice)

Kath Soucie

Mrs. Berman / Miriam Pataki (voice), Hillary / Martha (voice), Miriam Pataki / Yolanda (voice), Mariam Pataki (voice), Lunch Lady (voice), Mrs. Vitello (voice), Miriam Pataki / Woman (voice), Mrs. Berman / Mrs. Ryle (voice), Miriam Pataki (voice), Mrs. Berman (voice), Mrs. Berman / Danny (voice), Miriam Pataki / Nancy Woman (voice), Cecile (voice), Agent (voice)

Lisa Fuson

Movie Woman (voice), Miss Slovak (voice), Danny's Mom / Bratty Kid #2 (voice)

Craig Bartlett

Brainy (voice), Minister (voice), Arnold's Father (voice), Movie Man / Steve (voice), Mop Guy (voice), Brainy / Steel Mill Worker (voice), Brainy / Mr. Packenham (voice), Big Man (voice), Abner (voice), DJ (voice), Cabbie / Party Clown (voice), Monkeyman (voice; uncredited), Chester (voice), Father (voice), Nashville Ned / Customer #1 (voice), Brainy (voice; uncredited), Brainy / Paper Boy (voice), Brainy / DJ (voice), Brainy / Astronaut / Stockbroker (voice)

Julia Louis-Dreyfus

Miss Felter (voice)

Ron Perlman

Mickey Kaline / Weiner Cooker (voice), Mickey Kaline (voice)

Elliott Gould

Rabbi Goldberg (voice)

Cathy Moriarty

Tish Wittenberg (voice)

Daniel Stern

Mr. Packenham (voice)

Harvey Korman

Don Reynolds (voice)

Alan Paul

Dino Spumoni (singing voice)

David Wohl

Principal Wartz / Announcer (voice), Principal Wartz / Bad Guy (voice), Principal Wartz (voice), Mr. Berman / Bus Driver (voice), Mr. Berman (voice)

Kathy Najimy

Madame Blanche (voice)

Marty York

Mickey the Weasel / Fifth Grader #1 (voice)

Maurice LaMarche

Big Bob Pataki (voice), Big Bob Pataki / TV Man (voice), Stinky's Father / Stinky's Grandpa (voice), Revis (voice), Big Bob Pataki / Douglas Cain (voice), Big Bob Pataki / Mechanic (voice), Big Bob Pataki / Organ Grinder (voice), Big Bob Pataki / Clerk (voice), Big Bob Pataki / Moderator (voice), Maurice / Director (voice), Abner (voice), Big Bob Pataki / Uncle Chuck (voice), Cecile's Dad / Jacques (voice)

Tony Jay

Rex Smythe-Higgins (voice), Dr. Lipman (voice), Booming Voice (voice)

Nika Futterman

Olga Pataki (voice), Cynthia (voice), Lorenzo's Mother (voice)

John Schuck

Wally / Announcer (voice)

Ashley Buccille

Lila Sawyer (voice)

Danielle Judovits

Patricia "Big Patty" Smith (voice)

Clancy Brown

Dan (voice)

George Takei

Phoebe's Father (voice)

Jean Smart

Phoebe's Mother (voice)

Carol Kane

Emily Dickinson Trophy (voice)

Jamie Farr

Mr. Wacko (voice)

Dan Butler

Mr. Simmons (voice; uncredited), Mr. Simmons / Lila's Father (voice), Mr. Simmons (voice), Mr. Simmons / Dispatcher (voice), Mr. Simmons / Houseboy (voice), Mr. Simmons / Publisher (voice), Mr. Simmons / Scientist (voice)

Jordan Warkol

Chocolate Boy (voice), Chocolate Boy / Jamie (voice)

Sam McMurray

Robbie Fisher (voice)

Ashley Tesoro

Fifth Grader (voice)

Jer Adrianne Lelliott

Little Kid (voice)

Randy Travis

Travis Randall / Mr. Hyunh's Singing (voice)

Lori Alan

Rhonda's Mother (voice), Secretary / Cop / Candy Lady (voice)

Mary Gross

Shelley (voice), Nurse / Actress (voice)

Victor Samuel Lopez

Lorenzo (voice)

Wendy Hammers

Jackie Lee (voice)

Bronson Pinchot

Director / Chauffeur (voice), Ronnie Matthews (voice)

Peter Scolari

Doug LeSham (voice)

Gregg Berger

Lucky / Worker #1 (voice), Policeman / Jolly Olly Boss (voice)

Joseph Ashton

Iggy (voice)

Jane Carr

Inga (voice)

Moira Quirk

Woman / Kid #3 (voice)

Mitzi McCall

Pearl Simmons (voice)

Maria Bamford

Mayor Dixie / Stinky's Grandma (voice), Iggy's Mother (voice), Mayor Dixie (voice)

Rose Marie

Agatha Caulfield (voice)

Tim Curry

Mr. Leichliter (voice)

Josh Ryan Evans

3rd Grader (voice)

Phil LaMarr

Jamie O Johanssen (voice)

Candi Milo

Cherice (voice), The Parrot (voice)

Laraine Newman

Librarian / Kid (voice)

Phyllis Diller

Mitzi