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)
Lacey Chabert
as Penelope (voice)
Phil Morris
as Bud (voice)
Laya DeLeon Hayes
as Vicky (voice)
Keiko Agena
as Emiko (voice)
Bria Danielle Singleton
as Beth (voice) (as Bria Singleton)
Julian Zane
as Ernesto (voice)
Montse Hernandez
as Grace (voice)
Karim Saleh
as Mr. Tyabji (Voice)
Charlie Adler
as Santa (Voice)
