Mariah Carey

Older Mariah (voice)

Breanna Yde

Mariah (voice)

Henry Winkler

Grandpa Bill (voice)

Laya DeLeon Hayes

Vicky (voice)

Montse Hernandez

Grace (voice)

Issac Ryan Brown

Brett (voice)

Bria Danielle Singleton

Beth (voice)

Phil Morris

Bud (voice)

Lacey Chabert

Penelope (voice)

Charlie Adler

Santa / Mr. Ingersoll / Dougie’s Dad (voice)

Rachel Eggleston

Holly (voice)

Julian Zane

Ernesto (voice)

Karim Saleh

Mr. Tyabji (voice)

Connie Jackson

Grandma Lucy (voice)

Keiko Agena

Emiko (voice)

Dee Bradley Baker

Jack (voice)

Ali Eagle

Mrs. Alexander (voice)

Michelle Bonilla

Principal Reyes (voice)

Monroe Cannon

Michelle (voice)

Moroccan Cannon

Dougie (voice)