The Cast
Lead Cast
| Character | Lead | Understudy |
| Cat in the Hat | Jonathan Mull | Nick Hartman |
| JoJo | Nathan O’Tool | Benjamin Jaeger |
| Horton the Elephant | Emmett Jaeger | Joseph Perez |
| Gertrude McFuzz | Olivia Bernstein | Michalyn Slagle |
| Mayzie La Bird | Meaghan O’Hern | Kelly DeSimone |
| Sour Kangaroo | Madison Hurley | Caraline Dirks |
| Mr. Mayor | Sam Wilburn | Aaron Scherer |
| Mrs. Mayor | Elizabeth Robbins | Amber Goebel |
| Wickersham Brother 1 | Nick Hartman | |
| Wickersham Brother 2 | Joshua Catalan | |
| Wickersham Brother 3 | Riley Hahn | |
| Wickersham Brother 4 | Bethany Garmon | |
| Bird Girl 1 | Michalyn Slagle | |
| Bird Girl 2 | Caraline Dirks | |
| Bird Girl 3 | Megan Metcalf | |
| Bird Girl 4 | Grace Bennett | |
| Bird Girl 5 | Mandie Garcia |
Bit Parts
| Yertle the Turtle | Aaron Scherer | ||
| The Grinch | Amber Goebel | ||
| Hunter 1 | Kelly DeSimone | ||
| Hunter 2 | Joseph Perez | ||
| Vlad Vladikoff | Benjamin Jaeger | ||