A young girl named June with a big imagination makes an incredible discovery -- the amusement park of her dreams has come to life. Filled with the world's wildest rides operated by fun-loving animals, the excitement never ends. But when trouble hits, June and her misfit team of furry friends begin an unforgettable journey to save the park.
| Actor | Role |
|---|---|
 Brianna DenskiJune (voice) | June (voice) |
 Norbert Leo ButzPeanut (voice) | Peanut (voice) |
 Ken Hudson CampbellBoomer (voice) | Boomer (voice) |
 Mila KunisGreta (voice) | Greta (voice) |
 John OliverSteve (voice) | Steve (voice) |
 Kenan ThompsonGus (voice) | Gus (voice) |
 Ken JeongCooper (voice) | Cooper (voice) |
 Jennifer GarnerJune's Mom (voice) | June's Mom (voice) |
 Matthew BroderickJune's Dad (voice) | June's Dad (voice) |
 Sofia MaliYoung June (voice) | Young June (voice) |
 Aryan SimhadriBanky (Voice) | Banky (Voice) |
 Jolie Hoang-RappaportVanessa (Voice) | Vanessa (Voice) |
 Kevin ChamberlinUncle Tony (voice) | Uncle Tony (voice) |
 Kate McGregor-StewartAunt Albertine (voice) | Aunt Albertine (voice) |
 Kath SoucieBus Counselor Shannon (voice) | Bus Counselor Shannon (voice) |
 Lisa FoilesAdditional Voices (voice) | Additional Voices (voice) |