Arthur

Bruce Dinsmore

Mr. Read (voice) / Mr. Read / Binky Barnes / Bailey (voice)

Sonja Ball

Mrs. Read (voice)

Jodie Resther

Francine Frensky (voice)

Daniel Brochu

Buster Baxter (voice)

Tracy Braunstein

Baby Kate (voice)

Tamar Kozlov

Prunella (voice)

Arthur Holden

Mr. Ratburn / Bionic Bunny (voice)

Joanna Noyes

Grandma Thora (voice)

Melissa Altro

Muffy Crosswire (voice)

Simon Peacock

Pal (voice)

Jessica Kardos

Sue Ellen Armstrong / Sue Ellen Armstrong (voice)

Mitchell David Rothpan

George (voice) / George Lundgren

Michael Yarmush

Arthur Read / Arthur Read (voice) / Arthur Timothy Read

Oliver Grainger

D.W Read / D.W Read (voice)

Cameron Ansell

Arthur Read / Arthur Read (voice)

Alex Hood

Alan "The Brain" Powers / Alan "The Brain" Powers (voice)

Michael Caloz

D.W Read / D.W Read (voice)

Mark Rendall

Arthur Read / Arthur Read (voice)

Justin Bradley

Arthur Read / Arthur Read (voice)

Eleanor Noble

George (voice)

Sally Taylor-Isherwood

Emily (voice)

Patricia Rodríguez

Sue Ellen Armstrong (voice) / Sue Ellen Armstrong / Catherine Frensky (voice)

Vanessa Lengies

Emily (voice)

Jonathan Koensgen

Tommy Tibble (voice)

Ricky Mabe

Timmy Tibble (voice)

Luke Reid

Alan "The Brain" Powers (voice)

Jake Sim

Tommy Tibble (voice)

Alexina Cowan

Catherine Frensky (voice)

Jacob Ewaniuk

Timmy Tibble (voice)

Robyn Thaler Hickey

Catherine Frensky (voice)

Robert Naylor

D.W. Read (voice)

Dallas Jokic

Arthur Read (voice)

Lyle Lettau

Alan "The Brain" Powers (voice)

Samuel Holden

Timmy Tibble (voice)

Siam Yu

Alan "The Brain" Powers (voice)

Jason Szwimmer

D.W. Read (voice)

Paul Stuart-Brown

Alan "The Brain" Powers (voice)

Tyler Brody Stein

Timmy Tibble (voice) / Tommy Tibble (voice)

Melissa Altro

Muffy Crosswire / Muffy Crosswire (voice)

Steven Crowder

Alan "The Brain" Powers (voice)

William Healy

Arthur Read (voice)

Andrew Dayton

D.W. Read (voice)

Drew Adkins

Arthur Read (voice)

Jake Beale

D.W. Read (voice)

Jake Roseman

Tommy Tibble (voice)

Dakota Goyo

Timmy Tibble (voice)

Christopher Lortie

Timmy Tibble (voice)

Ryan Tilson

Tommy Tibble (voice)

Aaron Grunfeld

Tommy Tibble (voice)

A.J. Henderson

Ed Crosswire

Walter Massey

Principal Herbert Haney

Jacob Ursomarzo

Arthur Read (voice)

Max Friedman-Cole

Alan "The Brain" Powers (voice)

Christian Distefano

D.W. Read (voice)

Roman Lutterotti

Arthur Read (voice)

Ethan Pugiotto

D.W. Read (voice)

Bronwen Mantel

Mrs. Sarah MacGrady

Evan Smirnow

George (voice)

Simon Peacock

Pal (voice)

Evan Blaylock

Alan "The Brain" Powers (voice)

Mark Camacho

Oliver Frensky (voice) / Oliver Frensky / Henry Ford (voice)

Walter Massey

Mr. Haney (voice) / Principal Haney (voice) / Principal Herbert Haney (voice) / Principal Herbert Haney/Mr. Marco (voice)

Graeme Jokic

Young Fritz (voice)

Art Garfunkel

Art Garfunkel / Art Garfunkel (voice)

Michelle Kwan

Michelle Kwan (voice)

Fred Rogers

Mr. Rogers (voice)

Lance Armstrong

Lance Armstrong (voice)

Ellen David

Bitzi Baxter (voice) / Ruth (Voice)

Hayley Reynolds

Nadine Flamberghast (voice) / Nadine Flumberghast (voice)

Holly Gauthier-Frankel

Fern Walters (voice)

Yo-Yo Ma

Yo-Yo Ma (voice)

Joshua Redman

Joshua Redman (voice)

Brigid Tierney

Jenna Morgan (voice)

Susan Glover

Mrs. Powers (voice) / Mrs. Wood (voice)

Johnny Damon

Johnny Playmon (voice)

Edgar Rentería

Batería (voice)

Larry King

Larry King

Mike Timlin

Winlin (voice)

Jane Wheeler

Mrs. Barnes (voice)

Philip Seymour Hoffman

William Fillmore Toffman (voice)

Alyson Leah

Vicita Molina (voice)

Rick Jones

Jacob Katzenellenbogan (voice)

Marc Brown

Marc Brown (voice)

Kate Hutchison

Paige Turner (voice)

John Lewis

John Lewis (voice)

Rikee Madoff

Cecilia Tingley (voice)

Krystal Meadows

Ladonna Compson (voice)

Jane Woods

Laverne Frensky (uncredited)

Terrence Scammell

Mr. Powers (voice) (uncredited)

Kathleen Fee

Ms. Morgan (voice)

Kate Hutchinson

Paige Turner (voice)