Isabel

Julia Roberts

Auggie Pullman

Jacob Tremblay

Nate

Owen Wilson

Mr. Tushman

Mandy Patinkin

Via Pullman

Izabela Vidovic

Summer Dawson

Millie Davis

Jack Will

Noah Jupe

Justin

Nadji Jeter

Mr. Browne

Daveed Diggs

Miranda Navas

Danielle Rose Russell

Julian Albans

Bryce Gheisar

Ms. Petosa

Ali Liebert

Michelle

Emma Tremblay

Teenage Doctor

Mark Dozlaw

Charlotte Cody

Elle McKinnon

Nurse

Rukiya Bernard

Neonatologist

Jennifer March

Amos

Ty Nicolas Consiglio

Grans

Sônia Braga

Miles

Kyle Harrison Breitkopf

Henry

James Hughes

Henry Joplin

James A Hughes

Jack Will's Mom

Nicole Oliver

Darth Sidious

J. Douglas Stewart

Miranda's Mom

Rachel Hayward

Dodgeball Player

Joseph Gordon

Melissa Albans

Crystal Lowe

James

Cameron Roberts

Ella

Erika McKitrick

Mr. Davenport

Ben Ratner

Reid Kingsley

Izzy Lieberman

Rebecca

Hannah Hoberman

School Photographer

Jason McKinnon

Savanna Wittenberg

Lucia Thain

Chewbacca

Michael Alan Healy

Ximena Chin

Emily Delahunty

Maya Markowitz

Sasha Neuhaus

Eddie Johnson

William Dickinson

Ximena Chin

Emily- Rose Delahunty

Danny

Armen Bagdasarov

Lina Annan

Lidya Jewett

Angela

Kaelyn Breitkopf

Guy on Bus

Callahan Brebner

Our Town Player

Emily Giannozio

Our Town Player

Haley Goldin

Our Town Player

Caleb Gordon

Our Town Player

Grayson Maxwell Gurnsey

Young Olivia

Maccie Margaret Chbosky

Via (Age 4)

Macie Margaret Chbosky

Daisy

Gidget

Science Fair Judge

Victoria Cruz

Julian's sister

Laura Mozgovaya

Julian's Dad

Steve Bacic

Musical Theatre Student (voice)

Darcy Rose Byrnes

Danny

Armen Henry Bagdasarov

Classmate

Brayden Snow

Additional Voices (voice)

Brooke D. Singleton

School Kid

Andre Robinson

School Kid

Alyssa Andronyk

Camp Counsellor

Jason Tremblay

Simon Stimson

Wilson Chieng

Classmate

Dallas Snow

Classmate

Justin Snow

Classmate

Kayzhia Snow

Classmate Parent

Amber Snow

Classmate

Elayna Sing

Parent

Ann Evans

Additional Voice

Sean Ryan Fox