Grumpy Cat's worst Christmas stars the world-famous grumpy cat Tata Sauce and famous child star Megan Chapentier, while comedian Aubrey Plaza dubs Tata Sauce in the film. In the film, the cat can really talk. He lives in a pet shop in the mall. Because no one wants it all the time, he is grumpy and has an unhappy face every day. Crystal, the little girl played by Chapentier, meets him in the store, and the two spend a wonderful Christmas together and eventually become good friends. Grumpy Cat's worst Christmas will be released on November 29, 2014.