 Anya Taylor-JoyMarla | Marla |
 Jim GaffiganDel (voice) | Del (voice) |
 Gabriel BatemanCharlie | Charlie |
 Adam LambertEmperor Maximus (voice) | Emperor Maximus (voice) |
 Kenan ThompsonBloodbones (voice) | Bloodbones (voice) |
 Meghan TrainorFairy Godmother (voice) | Fairy Godmother (voice) |
 Daniel RadcliffeRex Dasher (voice) | Rex Dasher (voice) |
 Paloma RodríguezValera (voice) | Valera (voice) |
 Maddie TaylorGlinara (voice) | Glinara (voice) |
 Lino DiSalvoRobotitron (voice) | Robotitron (voice) |
 Ryan S. Hill6-Year-Old Charlie | 6-Year-Old Charlie |
 Mariah IngerPolice Officer 1 | Police Officer 1 |
| AAnnakin SlaydPolice Officer 2 | Police Officer 2 |
 Harry StandjofskiSecurity Guard | Security Guard |
 Dino AndradeScurvy Pete (voice) | Scurvy Pete (voice) |
 Ian James CorlettDogsled Driver (voice) | Dogsled Driver (voice) |
 Ben DiskinSeadog (voice) | Seadog (voice) |
 Kellen GoffSalty (voice) | Salty (voice) |
 Dan NavarroViking Leader (voice) | Viking Leader (voice) |
| TTito OrtizRoyal Guard (voice) | Royal Guard (voice) |
 Andrew PifkoS.K.U.L.L. Scientist (voice) | S.K.U.L.L. Scientist (voice) |
 Cindy RobinsonNola (voice) | Nola (voice) |
 Keith SilversteinLiam Brooks (voice) | Liam Brooks (voice) |
 Christopher Corey SmithWestern Outlaw (voice) | Western Outlaw (voice) |
 Spike SpencerVarious Voices (voice) | Various Voices (voice) |
 Karen StrassmanDr. Greta Grim (voice) | Dr. Greta Grim (voice) |
 Kirk ThorntonOok-Ook (voice) | Ook-Ook (voice) |
