"Tardar Sauce" Grumpy Cat ... as Herself Aubrey Plaza ... Grumpy Cat (voice) Daniel Roebuck ... George Megan Charpentier ... Chrystal Russell Peters ... Santa Veronica Alicino ... Collette Tasya Teles ... Greeter Trevor Lissauer ... Jacky (voice) Evan Todd ... Zack Shauna Johannesen ... Tabby Eduard Witzke ... Mac Michael Patrick Denis ... French Waiter Graeme Duffy ... Photographer Sydney Waack ... Mean Girl #3 Casey Manderson ... Jesse Isaac Haig ... Donny Matthew Enright ... Mall Shopper Arkie Kandola ... Father
In "Grumpy Cat's Worst Christmas Ever," Grumpy Cat is a lonely cat living in a mall pet shop. Because she always gets passed over and never gets chosen by customers, this kitty develops a sour outlook on life until...one day during the holidays, a very special 12-year-old girl named Chyrstal enters the pet store and falls in love with Grumpy Cat. A unique friendship is formed between the two when Chyrstal finds she is the only person who can hear this unique feline talk. In the middle of the holiday rush, Grumpy reluctantly thwarts the kidnapping of an expensive exotic dog she can't stand and rescues Chyrstal after the mall closes on Christmas Eve. Will Grumpy Cat learn the true meaning of Christmas, or will it be in Grumpy's words, “Worst. Christmas. Ever?