 Jimmy BennettToby Thompson | Toby Thompson |
 Jake ShortNose Noseworthy | Nose Noseworthy |
 Kat DenningsStacy Thompson | Stacy Thompson |
 Trevor GagnonLoogie Short | Loogie Short |
 Devon GearhartCole Black | Cole Black |
 Jolie VanierHelvetica Black | Helvetica Black |
 Rebel RodriguezLug Short | Lug Short |
 Leo HowardLaser Short | Laser Short |
 Leslie MannMom Thompson | Mom Thompson |
 Jon CryerDad Thompson | Dad Thompson |
 William H. MacyDr. Noseworthy | Dr. Noseworthy |
 James SpaderCarbon Black | Carbon Black |
 Angela LanzaTeacher | Teacher |
| AAlejandro Rose-GarciaJohn / Boyfriend | John / Boyfriend |
| CCambell WestmorelandBlinker #1 | Blinker #1 |
| ZZoe WebbBlinker #2 | Blinker #2 |
 Chris OrfGoofy Host | Goofy Host |
 Racer RodriguezBully #1 | Bully #1 |
| RRocket RodriguezBully #2 | Bully #2 |
| JJohn ChilleriHallway Kid (uncredited) | Hallway Kid (uncredited) |
| JJosh ChristmanClassroom Kid (uncredited) | Classroom Kid (uncredited) |
| JJoshua DrewClassmate (uncredited) | Classmate (uncredited) |
| ZZach IrsikSchoolyard Kid (uncredited) | Schoolyard Kid (uncredited) |
 Ryan LeeClassmate / Neighborhood Kid (uncredited) | Classmate / Neighborhood Kid (uncredited) |
| CChristina LehnerClassmate (uncredited) | Classmate (uncredited) |
| MMicaela PhillipsGirl on Bus (uncredited) | Girl on Bus (uncredited) |
| BBella PerrymanClassmate (uncredited) | Classmate (uncredited) |
| CCameron R. MurphyNeighborhood Kid | Neighborhood Kid |
| HHenry J. Smith 3rdNeighborhood Kid (uncredited) | Neighborhood Kid (uncredited) |
 Cameron Wofford(uncredited) | (uncredited) |
