By Yan Zhuang
Viral internet sensation Grumpy Cat, who rose to fame for her iconic frowning face, passed away on Tuesday, her family announced.
Grumpy Cat (whose real name is Tardar Sauce) was seven years old, about half the expected average lifespan of a cat.
She went viral in 2012 after her photo was posted on Reddit, her perpetually annoyed face striking a chord with people.
"We are unimaginably heartbroken to announce the loss of our beloved Grumpy Cat," wrote Tabatha Bundesen, Grumpy Cat's owner.
Ms Bundesen revealed the cat who "helped millions of people smile all around the world - even when times were tough" had suffered complications from an urinary tract infection.
"Her spirit will continue to live on through her fans everywhere," she wrote.
Tributes have poured in for the internet star, who boasted 1.5 million Twitter followers.
Grumpy Cat was also starred in a Lifetime Christmas movie, made the cover of New York Magazine and travelled the world making television appearances.
The first photo of Grumpy Cat posted online, which launched a thousand memes.Credit: Reddit
Her famous face is likely due to feline dwarfism, according to her owners.