 Brady NoonGreg (voice) | Greg (voice) |
 Ethan William ChildressRowley (voice) | Rowley (voice) |
 Hunter DillonRodrick (voice) | Rodrick (voice) |
 Erica CerraSusan (voice) | Susan (voice) |
 Chris DiamantopoulosFrank (voice) | Frank (voice) |
 Gracen NewtonManny (voice) | Manny (voice) |
 Christian ConveryFregley (voice) | Fregley (voice) |
 Jessica Mikayla AdamsBraces Girl (voice) | Braces Girl (voice) |
 Cyrus ArnoldTeen Driver (voice) | Teen Driver (voice) |
| BBraxton BakerTeen with Mullet (voice) | Teen with Mullet (voice) |
 Lossen ChambersHomeroom Teacher (voice) | Homeroom Teacher (voice) |
 Brenda CrichlowMrs. Fregley (voice) | Mrs. Fregley (voice) |
 Tessa EspinolaCurly-Haired Girl (voice) | Curly-Haired Girl (voice) |
 Yuvraj KalsiCharlie Davies (voice) | Charlie Davies (voice) |
| BBilly LopezMr. Underwood (voice) | Mr. Underwood (voice) |
 Donny LucasMr. Humphreys (voice) | Mr. Humphreys (voice) |
| VVeda MaharajChirag Gupta (voice) | Chirag Gupta (voice) |
 Jaime MacleanHolly Hills’s Friend (voice) | Holly Hills’s Friend (voice) |
 Robert MoloneyJoshie (voice) | Joshie (voice) |
 Gig MortonRandom Boy (voice) | Random Boy (voice) |
 Mizinga MwingaWizard (voice) | Wizard (voice) |
 John OmohundroHulking Teen (voice) | Hulking Teen (voice) |
 Zeno RobinsonTeen with Baseball Hat (voice) | Teen with Baseball Hat (voice) |
 Gracyn ShinyeiGirl with Ponytail (voice) | Girl with Ponytail (voice) |
| ÁÁine SunderlandBlonde-Haired Girl (voice) | Blonde-Haired Girl (voice) |
| JJen CainAdditional Voices (voice) | Additional Voices (voice) |
 Tristan Allerick ChenAdditional Voices (voice) | Additional Voices (voice) |
 Jordyn CuretAdditional Voices (voice) | Additional Voices (voice) |
 Johnny GidcombAdditional Voices (voice) | Additional Voices (voice) |
 Caleb JeonAdditional Voices (voice) | Additional Voices (voice) |
