| Cyrus Arnold | | Teen Driver (voice) |
| Braxton Baker | | Teen with Mullet (voice) |
| Erica Cerra | | Susan (voice) |
| Lossen Chambers | | Homeroom Teacher (voice) |
| Ethan William Childress | | Rowley (voice) |
| Christian Convery | | Fregley (voice) |
| Brenda Crichlow | | Mrs. Fregley (voice) |
| Chris Diamantopoulos | | Frank (voice) |
| Hunter Dillon | | Rodrick (voice) |
| Tessa Espinola | | Curly-Haired Girl (voice) |
| Yuvraj Kalsi | | Charlie Davies (voice) |
| Billy Lopez | | Mr. Underwood (voice) |
| Donny Lucas | | Mr. Humphreys (voice) |
| Jaime MacLean | | Holly Hills's Friend (voice) |
| Veda Maharaj | | Chirag Gupta (voice) |
| Jessica Mikayla | | Braces Girl (voice) |
| Robert Moloney | | Joshie (voice) |
| Gig Morton | | Random Boy (voice) |
| Mizinga Mwinga | | Wizard (voice) |
| Gracen Newton | | Manny (voice) |
| Brady Noon | | Greg (voice) |
| John Omohundro | | Hulking Teen (voice) |
| Zeno Robinson | | Teen with Baseball Hat (voice) |
| Gracyn Shinyei | | Girl with Ponytail (voice) |
| Áine Sunderland | | Blonde-Haired Girl (voice) |
| Jennifer Cain | | Additional Voices (voice) (as Jen Cain) |
| Tristan Allerick Chen | | Additional Voices (voice) (as Tristan Chen) |
| Julian Zane Chowdhury | | Additional Voices (voice) |
| Jordyn Curet | | Additional Voices (voice) |
| Johnny Gidcomb | | Additional Voices (voice) |
| Caleb Jeon | | Additional Voices (voice) |
| Ava Mae Leslie | | Additional Voices (voice) |
| Susan Leslie | | Additional Voices (voice) |
| Iara Nemirovsky | | Additional Voices (voice) |
| Matt Nolan | | Additional Voices (voice) |
| Andre Robinson | | Additional Voices (voice) |
| Carter Sand | | Additional Voices (voice) |
| Lily Rose Silver | | Additional Voices (voice) |
| Brooke Singleton | | Additional Voices (voice) |
| Jason Grant Smith | | Additional Voices (voice) |