| Cat in the Hat: Abby Bertrand | Sour Kangaroo: Hannah Zigoris DeMoss |
| Horton the Elephant: Tom Bailey | Young Kangaroo: Tara Ferrari |
| JoJo: Stephanie Casstevens | General Gengus Khan Schmitz: Zach Buckley |
| Mr. Mayor: Erich Jauch | Judge Yertle the Turtle: Bethany Koudelka |
| Mrs. Mayor: Jackie Zeman | Grinch: Nick Kalina |
| Mayzie La Bird: Shayda Teymourpour | Gertrude McFuzz: Marie Batty |
| Thing One: Katie Brodzik | Thing Two: Katy Westbrook |
| Cindy Lou Who: Katie Thomson | |
| Bird Girls | |
| BayBay: Chrissy Kunkel | BeBe: Jordan Hall |
| Babalonia: Amy Goodman | BayBay: Chrissy Kunkel |
| Wickershams | |
| Erich Jauch | Nick Kalina |
| James Breit | Katie Brodzik |
| Katy Westbrook | |
| Hunters | |
| Randy Noy | Areal Delacruz |
| Dimitri Young | James Breit |
| Citizens of the Jungle of Nool | |
| Chelsey Strickler | Catherine Hartauer |
| Sarah Holdcraft | Rachel Reff |
| Sami Sekula | Aubrey Smigel |
| Citzines of Whoville | |
| Lindsay Wood | Brianna Burke |
| Nicole Washelesky | Jennifer Znaniecki |
| Bethany Fenwick | Kayla Funfsinn |
| Jacquie Levine | Ivana Martinez |
| Heather Maze | Olivia Mueller |
| Sara Moshage | Randy Noy |
| James Breit | Areal Delacruz |
| Dimitri Young | |
| Max the Dog: TBA | |
