The cause was complications from a urinary tract infection, according to a statement from her official Twitter account.
They said she could not overcome complications from a recent urinary tract infection and died on Tuesday morning in the arms of her human mum Tabatha Bundesen. Grumpy Cat, the frown-faced Internet sensation, has made almost $100 million for its owner in just two years.
Grumpy Cat, whose pre-celebrity name was Tardar Sauce, burst to fame in 2012 when her owner's brother posted a picture of her mirthless mug on social media.
Grumpy Cat, whose sourpuss expression entertained millions on the internet and spawned thousands of memes, national television commercials and even a movie, has died at age seven.
Grumpy Cat's fame extended well beyond the World Wide Web. "This cat has brought so much joy to mine and millions of other people's lives the last few years", Twitter user Grace wrote.
Grumpy Cat became known for her signature frown after her owner posted a photo of her on the social media platform Reddit in 2012.
This Dec. 1, 2015 file photo shows Grumpy Cat posing for a photo in Los Angeles. Thank you to her owners for sharing her with us.
Cheer up Tardar Sauce, you're rich!
Long live Grumpy Cat!
The cat also made an appearance on Broadway, as well as starring in a film and "writing" four best-selling books.
Grumpy Cat, pictured in July 2014. She also accused Grenade of selling T-shirts and not sharing the profits.
The cat's famous scowl was the result of feline dwarfism, her family said, and though she was a mixed breed, her owners were unsure of the specific mix.
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