Social media sensation Grumpy Cat dies aged 7

Grumpy Cat.
Grumpy Cat. Photo credit: Getty

A furry online celebrity known as Grumpy Cat has tragically died, aged just seven years old.

Grumpy Cat, real name Tardar Sauce, shot to stardom in 2012 due to her iconic face.

The moggie has feline dwarfism and an underbite, causing her to look as though she's permanently frowning.

After a photo of her was shared on Reddit in 2012, she swiftly went viral and became an online meme.

On Friday (NZ time), her owners confirmed in posts on her social media accounts that she had passed away.

"Despite care from top professionals, as well as from her very loving family, Grumpy encountered complications from a recent urinary tract infection that unfortunately became too tough for her to overcome," her family wrote.

"She passed away peacefully on the morning of Tuesday, May 14, at home in the arms of her mommy, Tabatha."

Grumpy Cat was seven years old when she died.

Grumpy Cat boasted more than 8.5 million followers on Facebook, 2.4 million followers on Instagram and 1.5 million followers on Twitter - one of the top-followed cats in the world.

It's been estimated she had a net worth of up to US$100 million.

Tributes from her fans have flooded in on the social media comment section, with many thanking her for the "joy and laughter" the furry celebrity brought into their lives.

Her owners said Grumpy Cat helped "millions of people smile all around the world - even when times were tough".

"Her spirit will continue to live on through her fans everywhere," they wrote.

As well as her online stardom, Grumpy Cat also featured on the small screen - starring in 2014 made-for-TV Christmas movie Grumpy Cat's Worst Christmas Ever, voiced by actress Aubrey Plaza.