The grumpiest animal on the internet was a viral sensation, bringing smiles with her frown.

Grumpy Cat died Tuesday after she developed a urinary tract infection. Grumpy Cat was 7 years old. Her owners announced the news on social media, saying some days are grumpier than others.

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'Grumpy Cat' on the field before the MLB opening day game between the Colorado Rockies and the Arizona Diamondbacks at Chase Field on April 4, 2016, in Phoenix, Arizona.

Credit: Christian Petersen/Getty Images

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Credit: Christian Petersen/Getty Images

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Julian Conley listens during opening statements in his trial at Fulton County Superior Court in Atlanta on Wednesday, Sept. 17, 2025. The 25-year-old is accused of fatally shooting 8-year-old Secoriea Turner in July 2020. (Abbey Cutrer/AJC)

Credit: abbey.cutrer@ajc.com