 Matthew MorrisonThe Grinch | The Grinch |
 Denis O'HareOld Max | Old Max |
 Booboo StewartYoung Max | Young Max |
 Amelia MintoCindy-Lou Who | Cindy-Lou Who |
 Claire MachinGrandma Who | Grandma Who |
 Amy Ellen RichardsonMama Who | Mama Who |
 Ako MitchellPapa Who | Papa Who |
 Gary WilmotGrandpa Who | Grandpa Who |
| JJoe AllenEnsemble - Who 1 | Ensemble - Who 1 |
 Francesca MillsEnsemble - Who 2 | Ensemble - Who 2 |
 Bobbie LittleEnsemble | Ensemble |
| JJoseph ProuseEnsemble | Ensemble |
| KKirsty IngramEnsemble | Ensemble |
| RRebecca LouisEnsemble | Ensemble |
| BBilly NeversEnsemble | Ensemble |
| CCallum TrainEnsemble | Ensemble |
| IIdriss KargboEnsemble | Ensemble |
| LLisa MathiesonEnsemble | Ensemble |
| GGenevieve NicoleEnsemble | Ensemble |
 Tafari Cazembe EdwardsChildren's Ensemble - Danny Who | Children's Ensemble - Danny Who |
| AAlfie MurrayChildren's Ensemble - Boo Who | Children's Ensemble - Boo Who |
 Erin RushidiChildren's Ensemble - Bugsy | Children's Ensemble - Bugsy |
| LLouie GrayChildren's Ensemble - Sporty | Children's Ensemble - Sporty |
 Kanon NarumiChildren's Ensemble | Children's Ensemble |
| CChantelle TonoleteChildren's Ensemble - Punky | Children's Ensemble - Punky |
 Bebe MasseyChildren's Ensemble - Scallops | Children's Ensemble - Scallops |
| KKayleen NguemaChildren's Ensemble | Children's Ensemble |
 Lyla ToplassChildren's Ensemble - Betty | Children's Ensemble - Betty |
