Jacob Tremblay

Auggie Pullman

Acting

Julia Roberts

Isabel Pullman

Acting

Owen Wilson

Nate Pullman

Acting

Izabela Vidovic

Via Pullman

Acting

Noah Jupe

Jack Will

Acting

Millie Davis

Summer Dawson

Acting

Bryce Gheisar

Julian Albans

Acting

Mandy Patinkin

Mr. Tushman

Acting

Danielle Rose Russell

Miranda Navas

Acting

Daveed Diggs

Mr. Browne

Acting

Elle McKinnon

Charlotte Cody

Acting

Ali Liebert

Ms. Petosa

Acting

Nadji Jeter

Justin Hollander

Acting

Ty Consiglio

Amos Conti

Acting

Kyle Breitkopf

Miles Noury

Acting

James A Hughes

Henry Joplin

Acting

Nicole Oliver

Mrs. Will

Acting

Rachel Hayward

Mrs. Navas

Acting

Yan-Kay Crystal Lowe

Melissa Albans

Acting

Steve Bacic

Julian Albans, Sr.

Acting

Ben Immanuel

Mr. Davenport

Acting

Sônia Braga

Grandma

Acting

Izzy Lieberman

Reid Kingsley

Acting

Hannah Hoberman

Rebecca

Acting

Erika McKitrick

Ella

Acting

Lucia Thain

Savanna Wittenberg

Acting

Emily Delahunty

Ximena Chin

Acting

Sasha Neuhaus

Maya Markowitz

Acting

William Dickinson

Eddie Johnson

Acting

Armen Bagdasarov

Danny

Acting

Emma Tremblay

Michelle

Acting

Lidya Jewett

Lina Annan

Acting

Kaelyn Breitkopf

Angela

Acting

Emily Giannozio

Rebecca Gibbs

Acting

Haley Goldin

Mrs. Gibbs

Acting

Cameron Roberts

James

Acting

Grayson Maxwell Gurnsey

Wally

Acting

Maccie Margaret Chbosky

Young Olivia

Acting

Gidget

Daisy

Acting

Victoria Cruz

Science Fair Judge

Acting

Laura Mozgovaya

Julian's sister

Acting

Darcy Rose Byrnes

Musical Theatre Student (voice)

Acting

Jason McKinnon

School Photographer

Acting

Brayden Snow

Classmate

Acting

Brooke D. Singleton

Additional Voices (voice)

Acting

Andre Robinson

School Kid

Acting

Alyssa Andronyk

School Kid

Acting

Jason Tremblay

Camp Counsellor

Acting

Wilson Chieng

Simon Stimson

Acting

Dallas Snow

Classmate

Acting

Justin Snow

Classmate

Acting

Kayzhia Snow

Classmate

Acting

Amber Snow

Classmate Parent

Acting

Elayna Sing

Classmate

Acting

Ann Evans

Parent

Acting

Mark Dozlaw

Doogie Howser (uncredited)

Acting

Abigail Friend

Daughter at Coney Island Beach (uncredited)

Acting

Razvan Orban

Boy in red (uncredited)

Acting

Kari Staten

Parent (uncredited)

Acting

Sean Ryan Fox

Additional Voice

Acting