The Instagram famous cat called Lil Bub unexpectedly died In the United States. More than 2.4 million users are subscribed to her page.

The cat’s owner, Mike Bridavsky, announced about Lil's death to millions of followers on social media on Monday.

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This is my first photo with BUB next our last photo together. On the morning of Sunday, December 1st 2019 we lost the purest, kindest and most magical living force on our planet. BUB was cheerful and full of love laying in our bed with us Saturday night, but unexpectedly passed away peacefully in her sleep.. I have always been fully transparent about BUB's health, and it was no secret that she was battling a persistent and aggressive bone infection. Even knowing this, we weren't expecting her to pass so soon or so abruptly without warning. I truly believe that she willingly made the decision to leave her failing body so that our family would not have to make that difficult decision ourselves. It is impossible to put into words the profound effect that BUB has had on my life, on the lives of thousands of homeless pets, and on the lives of those of you that have cared for her as if she were your own family. She taught me everything that I know about unconditional love, she brought my wife Stacy and I together, she's the reason we have our beautiful children Rosco and Lula, and she has been a constant source of warmth and love in our lives for the past 8 years. To say that our family is devastated would be an understatement. But most importantly, BUB has made a huge difference in the world of animal welfare, and in the lives of millions of people worldwide. She has literally saved thousands of lives (both pets and humans), she started the first national fund for special needs pets, she was the subject of groundbreaking genetic and biological research, she's helped raise over $700,000 for animals in need, and has spread a message of determination, positivity, and perseverance to people all over the world. And even though my heart is absolutely crushed by her graceful departure from planet Earth, I know that her sprit, magic, and overwhelming energy are still with us, reminding us every day to be better. Dearest BUB, I will never forget your generosity, your limitless supply of love, or your uncanny ability to bring so much magic and joy to the world. I am forever honored and humbled that you chose me as your caretaker. Please visit all of us in our dreams o

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At the time of death, Lil Bub was only eight years old. Bridavski said that the cat suffered from acute bone infection and died in her sleep unexpectedly for the whole family. “Even knowing this, we weren’t expecting her to pass so soon or so abruptly without warning,” he said.

Lil Bub was known for her unusual appearance. She had bulbous eyes and a protruding tongue. She was born with several disorders including dwarfism and was rescued as a feral kitten.

The owner said some heartwarming words in memory of the pet. Mike is greatly thankful to her.

"She taught me everything that I know about unconditional love, she brought my wife Stacy and I together, she's the reason we have our beautiful children Rosco and Lula, and she has been a constant source of warmth and love in our lives for the past 8 years," Bridavsky added, speaking of Lil Bub.

The cat became one of the first animal celebrities on the Internet. Her photos were first posted on Tumblr in November 2011 before being taken off after being featured on the social news website Reddit. The "Lil Bub" phrase has over three million likes on Facebook. A unique expression of her muzzle with the protruding tongue and short legs made her an Internet star along with Grumpy Cat, who also died earlier in 2019. Lil Bub currently has 2.4 million Instagram followers.

The cat appeared in several commercials and a documentary film called Lil Bub & Friendz that premiered at the Tribeca Film Festival on April 18, 2013, and won the Tribeca Online Festival Best Feature Film. Lil Bub’s family organized fundraising for charity. Thanks to Lil Bub, they raised more than 700 thousand dollars for several organizations helping animals.

Besides, Lil Bub had her own store – the BUB STORE, where you can find clothes, toys, and cups with Bub.