Characters played by Mariah Carey
Older Mariah
Characters played by Breanna Yde
Mariah
Characters played by Henry Winkler
Grandpa Bill
Characters played by Laya DeLeon Hayes
Vicky
Characters played by Montse Hernandez
Grace
Characters played by Issac Ryan Brown
Brett
Characters played by Bria Danielle Singleton
Beth
Characters played by Phil Morris
Bud
Characters played by Lacey Chabert
Penelope
Characters played by Charlie Adler
Santa
Mr. Ingersoll
Dougie's Dad
Characters played by Rachel Eggleston
Holly
Characters played by Julian Zane Chowdhury
Ernesto
Characters played by Karim Saleh
Mr. Tyabji
Characters played by Connie Jackson
Grandma Lucy
Characters played by Keiko Agena
Emiko
Characters played by Dee Bradley Baker
Jack
Characters played by Ali Eagle
Mrs. Alexander
Characters played by Michelle C. Bonilla
Principal Reyes
Characters played by Monroe Cannon
Michelle
Characters played by Moroccan Cannon
Dougie