Eden Sher

as Star Butterfly (voice)

Adam McArthur

as Marco Diaz (voice)

Alan Tudyk

as King River / Ludo (voice)

Grey DeLisle

as Queen Moon Butterfly (voice)

Michael C. Hall

as Toffee (voice)

Natalie Palamides

as Foolduke (voice)

Jeffrey Tambor

as Glossaryck (voice)

Fred Tatasciore

as Buffrog (voice)

Patrick Stump

as Ruberiot (voice)

Esmé Bianco

as Eclipsa (voice)

Zosia Mamet

as Heckapoo (voice)

Amy Sedaris

as Mina (voice)

Dee Bradley Baker

as Bald Eagle / Giant Spider (voice)

Kevin Michael Richardson

as Rhombulus (voice)

Artt Butler

as Mr. Diaz (voice)

Katie Driver

as Young Moon Butterfly (voice)

Greg Ellis

as Manfred (voice)

Nia Vardalos

as Angie Diaz (voice)

Sonny Ashbourne Serkis

as Young River Johansen (voice)

Chris Tergliafera

as Rasticore (voice)

Carl Weathers

as Omnitraxus Prime (voice)

Daron Nefcy

as Additional Voices

Mark Gagliardi

as Additional Voices

Tress MacNeille

as Additional Voices

Jeff Bennett

as Additional Voices

Dominic Bisignano

as Additional Voices

Keith Ferguson

as Additional Voices

Scott Menville

as Zeke / Corn Cob Vendor (voice)

Kari Wahlgren

as Baby Meteora (voice)

Travis Willingham

as Additional Voices

Kimaya Thais

as Katrina (voice)