The Grumpy cat's star is rising... the meme-tastic feline who became an Internet sensation after pictures were posted on Reddit last fall of her perpetually unhappy-looking face and went viral. Grumpy Cat, an 11-month-old mixed breed whose real name is Tartar Sauce, has been receiving visitors at the lounge at SXSW run by the tech-news site Mashable, where people have been standing in line for hours to get their pictures taken with her. Grumpy Cat has been taking it all in stride, mostly sleeping in a cat bed while fans pose next to her, many making their own grumpy faces. Tartar Sauce lives in Arizona with her owner, Tabatha Bundesen, and now has her own website and a Facebook page, YouTube channel and Twitter account.

Check out Grumpy cat's website:http://www.grumpycats.com/