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Happy 5th birthday Grumpy Cat!

Grumpy CatThis one-year-old feline's perpetually frowning face turned her into a massive online sensation over the past year. Her cat empire is now worth an estimated $1 million and includes a coffee line, a New York Times-

Internet sensation and meme star "Grumpy Cat" is celebrating her fifth birthday Tuesday.

According to her official website, the feline known as Grumpy Cat is actually named Tardar Sauce.

via GIPHY

She was born on April 4, 2012.

The first Grumpy Cat photo was posted a few months later in September.

Her family said some people suggested the photos had been manipulated, so they posted videos of Tardar Sauce on YouTube. 

Those videos went viral, and now the cat is seen in memes all over the world.

Tardar Sauce's family says she is actually not grumpy.

In fact, she is very cuddly and loves to be held.