 Eden SherStar Butterfly (voice) | Star Butterfly (voice) |
 Adam McArthurMarco Diaz (voice) | Marco Diaz (voice) |
 Alan TudykKing River / Ludo (voice) | King River / Ludo (voice) |
 Grey DeLisleQueen Moon Butterfly (voice) | Queen Moon Butterfly (voice) |
 Michael C. HallToffee (voice) | Toffee (voice) |
 Natalie PalamidesFoolduke (voice) | Foolduke (voice) |
 Jeffrey TamborGlossaryck (voice) | Glossaryck (voice) |
 Fred TatascioreBuffrog (voice) | Buffrog (voice) |
 Patrick StumpRuberiot (voice) | Ruberiot (voice) |
 Esmé BiancoEclipsa (voice) | Eclipsa (voice) |
 Zosia MametHeckapoo (voice) | Heckapoo (voice) |
 Amy SedarisMina (voice) | Mina (voice) |
 Dee Bradley BakerBald Eagle / Giant Spider (voice) | Bald Eagle / Giant Spider (voice) |
 Kevin Michael RichardsonRhombulus (voice) | Rhombulus (voice) |
 Artt ButlerMr. Diaz (voice) | Mr. Diaz (voice) |
| KKatie DriverYoung Moon Butterfly (voice) | Young Moon Butterfly (voice) |
 Greg EllisManfred (voice) | Manfred (voice) |
 Nia VardalosAngie Diaz (voice) | Angie Diaz (voice) |
 Sonny Ashbourne SerkisYoung River Johansen (voice) | Young River Johansen (voice) |
| CChris TergliaferaRasticore (voice) | Rasticore (voice) |
 Carl WeathersOmnitraxus Prime (voice) | Omnitraxus Prime (voice) |
 Daron NefcyAdditional Voices | Additional Voices |
 Mark GagliardiAdditional Voices | Additional Voices |
 Tress MacNeilleAdditional Voices | Additional Voices |
 Jeff BennettAdditional Voices | Additional Voices |
| DDominic BisignanoAdditional Voices | Additional Voices |
 Keith FergusonAdditional Voices | Additional Voices |
 Scott MenvilleZeke / Corn Cob Vendor (voice) | Zeke / Corn Cob Vendor (voice) |
 Kari WahlgrenBaby Meteora (voice) | Baby Meteora (voice) |
 Travis WillinghamAdditional Voices | Additional Voices |
