Stephen Chbosky Director, Screenwriter Julia Roberts Isabel Actor Owen Wilson Nate Actor Jacob Tremblay Auggie Actor Izabela Vidovic Via Actor Noah Jupe Jack Will Actor Nadji Jeter Justin Actor Daveed Diggs Mr. Browne Actor Mandy Patinkin Mr. Tushman Actor Ali Liebert Ms. Petosa Actor Emma Tremblay Michelle Actor Millie Davis Summer Actor Bryce Gheisar Julian Actor Danielle Rose Russell Miranda Actor Elle McKinnon Charlotte Actor Sônia Braga Grans Actor Ty Consiglio Amos Actor Kyle Breitkopf Miles Actor James A. Hughes Henry Actor Steve Conrad Screenwriter Jack Thorne Screenwriter Jeff Skoll Executive Producer Robert Kessel Executive Producer Michael Beugg Executive Producer Alexander Young Executive Producer R.J. Palacio Executive Producer Qiuyun Long Executive Producer David Hoberman Producer Todd Lieberman Producer Don Burgess Cinematographer Mark Livolsi Film Editing Marcelo Zarvos Original Music Kalina Ivanov Production Design Monique Prudhomme Costume Design Kendelle Elliott Art Director Shannon Gottlieb Set Decoration Deborah Aquila Casting Mary Tricia Wood Casting Jennifer L. Smith Casting