May 17: Grumpy Cat, the feline famous on the internet for her permanent scowl, has died aged seven, her owners say.

A statement says she died on Tuesday following complications from a recent urinary tract infection.

The cat from Arizona had "helped millions of people smile".

Grumpy, whose real name was Tardar Sauce, went viral in 2012 after photographs of her sour expression emerged online. Her image quickly spread as a meme.

According to owner Tabitha Bundesen, her facial expression was caused by feline dwarfism.

Grumpy Cat traveled the world making television appearances and in 2014, even starred in her own Christmas film.

 
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