Jacob Tremblay character Auggie Pullman
Owen Wilson character Nate Pullman
Julia Roberts character Isabel Pullman
Izabela Vidovic character Via Pullman
Danielle Rose Russell character Miranda Navas
Mandy Patinkin character Mr. Tushman
Daveed Diggs character Mr. Browne
Noah Jupe character Jack Will
Bryce Gheisar character Julian Albans
Millie Davis character Summer Dawson
Elle McKinnon character Charlotte Cody
Ali Liebert character Ms. Petosa
Nadji Jeter character Justin Hollander
Ty Consiglio character Amos Conti
Kyle Breitkopf character Miles Noury
James A Hughes character Henry Joplin
Nicole Oliver character Mrs. Will
Rachel Hayward character Mrs. Navas
Crystal Lowe character Melissa Albans
Steve Bacic character Julian Albans, Sr.
Ben Ratner character Mr. Davenport
Sônia Braga character Grandma
Izzy Lieberman character Reid Kingsley
Hannah Hoberman character Rebecca
Erika McKitrick character Ella
Lucia Thain character Savanna Wittenberg
Emily Delahunty character Ximena Chin
Sasha Neuhaus character Maya Markowitz
William Dickinson character Eddie Johnson
Armen Bagdasarov character Danny
Emma Tremblay character Michelle
Lidya Jewett character Lina Annan
Kaelyn Breitkopf character Angela
Emily Giannozio character Rebecca Gibbs
Haley Goldin character Mrs. Gibbs
Cameron Roberts character James
Grayson Maxwell Gurnsey character Wally
Maccie Margaret Chbosky character Young Olivia
Gidget character Daisy
Victoria Cruz character Science Fair Judge
Laura Mozgovaya character Julian's sister
Darcy Rose Byrnes character Musical Theatre Student (voice)
Jason McKinnon character School Photographer
Brayden Snow character Classmate
Brooke D. Singleton character Additional Voices (voice)
Andre Robinson character School Kid
Alyssa Andronyk character School Kid
Jason Tremblay character Camp Counsellor
Wilson Chieng character Simon Stimson
Dallas Snow character Classmate
Justin Snow character Classmate
Kayzhia Snow character Classmate
Amber Snow character Classmate Parent
Elayna Sing character Classmate
Ann Evans character Parent
Mark Dozlaw character Doogie Howser (uncredited)
Abigail Friend character Daughter at Coney Island Beach (uncredited)
Razvan Orban character Boy in red (uncredited)
Kari Staten character Parent (uncredited)
Sônia Braga character Grans (as Sonia Braga)
Sean Ryan Fox character Additional Voice
