Role in the film
Anthony is looking forward to two things: passing his driver's test and to be able to drive Celia to the prom. While he is talking to her on the phone, his younger brother, Alexander, thinks that he is talking nice to him. Due to misleading insults toward his "idiot brother", she hangs up thinking that she is the one being insulted.
The next day, after Alexander's birthday "wish", Anthony notices a zit on his forehead. His father, Ben, advises him to cover it up with a Band-Aid. At school, he manages to make it up with Celia by talking to her in the hall. Afterward, he gets so excited that he jumps up, accidentally breaking the trophy cases, and gets sent to the principal.
Later on, while Anthony is taking his driver's test, he receives a call from Celia. Ms. Suggs tests him about what is more important to him. When he chooses to answer the phone, she orders him to put it down. This causes him to accidentally drive recklessly and then fail the test. During a family argument, he first pins the blame onto Alexander for his worst day ever.
By the time he picks up a teal suit, his parents decide to be the ones to drive him and Celia to the prom. When she notices his outfit, she thinks he looks like Willy Wonka. On their way to Nagamaki, he keeps silent as the others are making noises through their fists. At Nagamaki, they sit far away from the others and she scolds him on how she hates this kind of restaurant. Upon seeing Ben embarrassing himself, Anthony and the others kick trash cans around and he realizes that having a bad day with his loved ones makes it a good one. While Celia mentions that her unnamed friend is gonna offer them a ride together, he refuses, breaks up with her, and realized that the prom isn't really worth it.
Back home, he notices that there's an Australian petting zoo for Alexander's birthday party and an alligator in the living room. He is last seen standing around in the backyard during the party.