Leah Lewis
Ember Lumen (voice)
Mamoudou Athie
Wade Ripple (voice)
Ronnie del Carmen
Bernie Lumen (voice)
Shila Ommi
Cinder Lumen (voice)
Wendi McLendon-Covey
Gale (voice)
Catherine O'Hara
Brook Ripple (voice)
Mason Wertheimer
Clod (voice)
Ronobir Lahiri
Harold (voice)
Wilma Bonet
Flarrietta (voice)
Joe Pera
Fern Grouchwood (voice)
Matthew Yang King
Alan / Lutz / Earth Pruner (voice)
Clara Lin Ding
Little Kid Ember (voice)
Reagan To
Big Kid Ember (voice)
Jeff Lapensee
Sparkler Customer (voice)
Ben Morris
Wood Immigration Official (voice)
Alex Kapp
Customer / Delivery Person / Earth Landlord (voice)
P.L. Brown
Doorman (voice)
Jonathan Adams
Flarry (voice)
Innocent Ekakitie
Marco and Polo Ripple (voice) (uncredited)