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Grumpy Cat, the million-dollar pet who became famous on the internet by virtue of her unusually ill-tempered facial expression has died aged only seven years old.
The cat's real name is Tardar Sauce, and her permanent scowl is a result of her having been born with dwarfism and an underbite.
The animal, from Morristown, Arizona, garnered millions of fans throughout her relatively short life and was estimated to be worth over £70m.
Writing on Twitter, her owner Tabatha Bundesen said: "Some days are grumpier than others", revealing that her beloved animal died in her arms after suffering complications from a urinary tract infection.
The post reads: "Despite care from top professionals, as well as from her very loving family, Grumpy encountered complications from a recent urinary tract infection that unfortunately became too tough for her to overcome," it continues. © Provided by Telegraph Media Group Limited
"Besides being our baby and a cherished member of the family, Grumpy Cat has helped millions of people smile all around the world - even when times were tough. Her spirit will continue to live on through her fans everywhere."
After a photograph of Tardar Sauce went viral on social media, the pet was able to lift her owner from life as a waitress, to become the animal's full-time manager.
Grumpy Cat has more than 2.4m followers on Instagram and 1.5m followers on Twitter.
Lucrative deals which came as a result of the moggie's strange look include a brand of iced coffee, called Grumppuccino, and the cat was also "the face" of Friskies.
The cat also made an appearance on Broadway, as well as starring in a film and 'writing' four best-selling books.
Fans mobbed the animal whenever she appeared in their city, as she was frequently flown around the world to meet her admirers.
Ms Bundesen insisted the pet did not mind these meet and greets, adding in 2016 that Grumpy only met fans for two hours a week before having a well-deserved rest at home with her brother Pokey.