Updated

It probably won't affect her sour mood, but Grumpy Cat now has an endorsement deal.

Nestle Purina PetCare said Tuesday that the frown-faced Internet sensation — real name Tardar Sauce — is now the "spokescat" for a Friskies brand of cat food. The St. Louis-based company didn't release terms of the deal.

Grumpy Cat, whose brown and white face wears a constant scowl, has become an online sensation.

Her photos are a constant presence on Facebook and other social media, and she's among the biggest stars of the peculiar trend of cat dominance on Web videos and postings.

Grumpy Cat's own Facebook page has 1.3 million likes. The dour animal also has more than 111,000 Twitter followers.

Nestle Purina featured Grumpy Cat in an online video game series in March.