In a city where fire, water, land and air residents live together, a fiery young woman and a go-with-the-flow guy will discover something elemental: how much they have in common.
| Ember (voice) | Leah Lewis |
| Wade (voice) | Mamoudou Athie |
| Bernie (voice) | Ronnie del Carmen |
| Cinder (voice) | Shila Ommi |
| Gale (voice) | Wendi McLendon-Covey |
| Brook (voice) | Catherine O'Hara |
| Clod (voice) | Mason Wertheimer |
| Harold (voice) | Ronobir Lahiri |
| Flarrietta (voice) | Wilma Bonet |
| Fern (voice) | Joe Pera |
| Alan / Lutz / Earth Pruner (voice) | Matthew Yang King |
| Little Kid Ember (voice) | Clara Lin Ding |
| Big Kid Ember (voice) | Reagan To |
| Sparkler Customer (voice) | Jeff Lapensee |
| Wood Immigration Official (voice) | Ben Morris |
| Flarry (voice) | Jonathan Adams |
| Customer / Delivery Person / Earth Landlord (voice) | Alex Kapp Horner |
| Doorman (voice) | P.L. Brown |
