Grumpy Cat became a viral sensation in 2013.

SALT LAKE CITY — Cats have nine lives, but Grumpy Cat’s have been cut short — the famous frowning feline has passed away at age 7.

According to NPR, Grumpy Cat — originally named Tardar Sauce — passed away due to a urinary tract infection on May 14. Grumpy Cat’s owner, Tabatha Bundesen, released a statement on Twitter recognizing the joy her pet brought to many around the world.

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"Grumpy Cat has helped millions of people smile all around the world — even when times were tough," she wrote. “Her spirit will continue to live on through her fans everywhere.”

Grumpy Cat’s infamous frown is the result of an underbite, and the cat’s popularity on Reddit propelled her to stardom in 2013. Stan Lee and Oscar the Grouch have also been pictured frowning with Grumpy Cat.

Other Twitter users and brands have also expressed their sympathies and gratitude for Grumpy Cat.