 Chloë Grace MoretzCarrie White | Carrie White |
 Julianne MooreMargaret White | Margaret White |
 Gabriella WildeSue Snell | Sue Snell |
 Ansel ElgortTommy Ross | Tommy Ross |
 Alex RussellBilly Nolan | Billy Nolan |
 Judy GreerMiss Desjardin | Miss Desjardin |
 Portia DoubledayChris Hargensen | Chris Hargensen |
 Zoë BelkinTina Blake | Tina Blake |
 Samantha WeinsteinHeather | Heather |
 Karissa StrainNicki Watson | Nicki Watson |
 Katie StrainLizzy Watson | Lizzy Watson |
 Demetrius JoyetteGeorge Dawson | George Dawson |
 Barry Shabaka HenleyPrincipal Henry Morton | Principal Henry Morton |
 Arlene MazerolleMiss Helen Finch | Miss Helen Finch |
| EEvan GilchristGreg Delois | Greg Delois |
 Eddie Max HubandHarry Trenant | Harry Trenant |
| TTyler RushtonNeighborhood Kid | Neighborhood Kid |
 Connor PriceFreddy 'Beak' Holt | Freddy 'Beak' Holt |
 Jefferson BrownMr. Ulmann | Mr. Ulmann |
 Cynthia PrestonEleanor Snell | Eleanor Snell |
 Philip NozukaErnie Peterson | Ernie Peterson |
 Kyle MacKenny | Kenny |
 Michelle NoldenEstelle | Estelle |
 Mouna TraoréErika | Erika |
 Chris BrittonDr. Dean L. McDuffy | Dr. Dean L. McDuffy |
 Derek McGrathHead Commissioner | Head Commissioner |
 Max TopplinJackie | Jackie |
 Irene PooleEstelle's Mother (uncredited) | Estelle's Mother (uncredited) |
 Hart BochnerMr. Hargensen (uncredited) | Mr. Hargensen (uncredited) |
 Natalie DaleRachel Spies (uncredited) | Rachel Spies (uncredited) |
