| Director | Stephen Chbosky |
|---|---|
| Budget | $20 million |
| Box office | $315 million |
August "Auggie" Pullman is a 10-year-old boy living in Brooklyn with his parents, Isabel and Nate, older sister Olivia "Via", and their dog, Daisy. Auggie was born with a rare medical facial deformity, mandibulofacial dysostosis. He has undergone 27 surgeries to help him function and wears an astronaut helmet when out in public. Auggie has been homeschooled by Isabel, but as he approaches the fifth grade, Isabel and Nate decide to enroll Auggie at Beecher Prep, a private middle school. When the school year begins, he is ostracized and is constantly bullied by Julian Albans, the class bully, and his friends, Amos Conti, Miles Noury, and Henry Joplin, but Auggie soon forms a close friendship with his classmate Jack Will, whom he met during a tour of the school.
For Halloween, Auggie dresses as Ghostface from the previous year after Daisy ruins his planned Boba Fett costume. While entering his homeroom, Auggie overhears Jack, who does not recognize him (expecting him to be dressed as Boba Fett), joining Julian and his friends in making fun of him behind his back. Auggie also overhears Jack saying that he was forced to be friends with Auggie and would "kill himself" if he looked like Auggie. An upset Auggie becomes sick forcing Isabel to abandon her mother-daughter day with Via to pick him up. Though she is hurt, Via convinces Auggie to go trick-or-treating with her, as she has been rejected by her own best friend, Miranda Navas.
Auggie begins avoiding Jack and forms a new friendship with another classmate, Summer Dawson, confiding in her about his split with Jack. When Jack eventually asks Summer why Auggie is avoiding him, she says "Ghostface". This gets Jack to realize his mistake. As an apology, he decides to partner with Auggie instead of Julian and Amos for the science fair project, angering Julian. When Julian confronts Jack about it and calls Auggie a freak, they get into a fight. Outraged, Julian ends his friendship with Jack. Jack is suspended for two days, and the principal, Mr. Lawrence Tushman, reads Jack's letter about defending Auggie. Later, Daisy is rushed to the vet after falling ill and dies shortly after, leaving the family sad. Jack then apologizes to Auggie via Minecraft, and they reconcile.
Meanwhile, Via has been feeling left out; ever since Auggie was born, Isabel and Nate have spent considerably more time looking after him than paying attention to her. Via signs up for the drama club after meeting theater nerd Justin Hollander, with whom she begins a romantic relationship. Via is selected as Miranda's understudy for the lead role in the school's production of Our Town, but on opening night, Miranda feigns illness to let Via take her place after learning that Via's family is in attendance while her own is not. Via gives a moving performance, earning a standing ovation, and reconciles with Miranda.
Auggie's popularity and circle of friends grow after he and Jack win first prize at the science fair, but Julian and his friends still bully Auggie. Eventually, Mr. Tushman confronts Julian and his parents with evidence, including hate notes and a class picture with Auggie photoshopped out and a caption reading: "No freaks allowed", and at the back of the class picture, Julian wrote: "Do everyone a favor and die". Mrs. Albans admits she deleted Auggie from the picture, defends Julian's actions, and insists that students should not be exposed to Auggie. Despite the Albans' threats to pull funding, Julian is suspended for two days, forcing him to miss an upcoming nature retreat. As they leave, Mrs. Albans declares that Julian will not be back in the fall. However, Julian apologizes to Mr. Tushman, who forgives him.
At the nature retreat, Auggie and Jack are threatened by a trio of seventh graders from another school, but Amos, Miles, and Henry defend them. Just before Auggie's graduation, Nate reveals to him that he put his astronaut helmet in his office, and asks Auggie if he needs it back, but Auggie happily dismisses this. At the graduation ceremony, Auggie thanks Isabel for enrolling him in school, and Isabel tells Auggie that he is a "wonder". Auggie is given the Henry Ward Beecher Medal for his strength and courage throughout the school year.