When young Mariah sees a darling little puppy named "Princess" at the pet store, she suddenly knows exactly what she wants for Christmas. But before her Christmas wish can come true, she must prove that she can dog-sit her uncle's dog, Jack, a scraggly rascal; in fact, the worst dog in the county!
Mariah Carey
as Older Mariah (voice)
Breanna Yde
as Mariah (voice)
Henry Winkler
as Grandpa Bill (voice)
Laya DeLeon Hayes
as Vicky (voice)
Montse Hernandez
as Grace (voice)
Issac Ryan Brown
as Brett (voice)
Bria Danielle Singleton
as Beth (voice)
Phil Morris
as Bud (voice)
Lacey Chabert
as Penelope (voice)
Charlie Adler
as Santa / Mr. Ingersoll / Dougie’s Dad (voice)
Rachel Eggleston
as Holly (voice)
Julian Zane
as Ernesto (voice)
