Here are some facts you may not know about the notoriously cranky housecat.

• She was born on April 4, 2012, which means she’s probably the planet’s most famous three-year-old.

• The cat’s permanent grumpy face is caused by, according to owner Tabatha Bundesen, a underbite and feline dwarfism. The cat shot to fame after Tabatha’s brother posted a photo of her on Reddit in Sept. 2012.

• “Grumpy Cat” is a stage name. The feline’s real name is the arguably better Tardar Sauce.

• The cat has an agent of course. Grumpy Cat’s is Ben Lashes, who has managed other “viral stars,” such as “Keyboard Cat” and “Ridiculously Photogenic Guy.”

• In order to keep her calm, healthy, and allow her to live a life as close to that of the average cat, Tardar Sauce only participates in brief public appearances. Photo shoots are held once a week and strangers often aren’t allowed to hold her.

• Grumpy Cat’s TV appearances have included “interviews” on Good Morning America and American Idol, a Honey Nut Cheerios commercial, hosting an episode of WWE Monday Night Raw, and starring in the TV movie Grumpy Cat’s Worst Christmas Ever.

• An appearance at the 2013 SXSW Interactive Festival attracted 600 people who waited in a three-block long line for hours in order to get their photos taken with her.

• As ridiculous as all of this might sound, it gets more ridiculous: Tardar Sauce is one of the world’s most wealthy celebrities. At one point, all of her book deals (her first one hit The New York Times bestseller list), public appearances, merchandise tie-ins, and film projects were estimated to be worth over $100 million. There’s even a line of Grumpy Cat Premium Iced Coffees.