Grumpy Cat, the adorable cat with the sour puss face that became an internet viral sensation and subject of endless memes has died at the age of 7. Grumpy Cat's family made the sad announcement on their various social media feeds early this morning. "We are unimaginably heartbroken to announce the loss of our beloved Grumpy Cat," Grumpy Cat's owner, Tabatha Bundesen, wrote.