Brenda Song

Anne Boonchuy

Justin Felbinger

Sprig

Bill Farmer

Hop Pop

Amanda Leighton

Polly

Anna Akana

Sasha Waybright

Troy Baker

Grime / Additional Voices

Haley Tju

Marcy Wu

Keith David

King Adrias

Whoopi Goldberg

Mother Olm

Brian Maillard

Leopold Loggle

Zehra Fazal

Yunan

Michelle Dockery

Lady Olivia

Charlyne Yi

The Guardian

Susanne Blakeslee

Valeriana

James Patrick Stuart

One-Eyed Wally

Sam Riegel

Leander / Additional Voices

Laila Berzins

Mrs. Croaker / Additional Voices

Jill Bartlett

Maddie / Additional Voices

Stephen Root

Mayor Toadstool

Jack McBrayer

Toadie

Katie Crown

Ivy

William Houston

Aldrich / The Core

Matt Chapman

Tritonio