Son Mabelcorn

Carl Faruolo

Grenda (voice)

Gregg Turkington

Toby Determined (voice)

J.K. Simmons

Stanford Pines (voice)

Sam Marin

Celestabellebethabelle (voice)

Kari Wahlgren

Mabel's Toy Unicorn (voice)

Matt Chapman

Additional Voices (voice)

Niki Yang

Candy Chiu (voice)