When a cat owner from New York first got her rag doll kitten, she was worried that he wouldn’t grow as fluffy as the breed usually gets, because of the way he looked. Two years later, however, his transformation has shocked social-media users.

A viral TikTok video shared in February under the username @sirgeorgetheragdoll, shows Sir George as a kitten, hanging out in his living room, looking like a regular short-haired kitten. “He’s so scrawny I don’t think he’ll get that fluffy,” the poster writes in the video.

However, the second part of the clip shows his incredible transformation in just two years; he has turned into a real-life “certified mega-floof,” as his own mom describes him in the caption, due to his thick, long, and shiny fur.

The poster, who asked to remain anonymous, told Newsweek that Sir George is a 3-year-old rag doll cat who loves watching animal documentaries, sleeping in the bathroom sink, playing with springs, and cuddling. Despite looking so big, he is just a regular-size cat covered in an insane amount of fur.

“Ragdolls are known for being big and fluffy, but George was so little as a kitten, with his short-haired coat, that I wasn’t entirely sure what to expect. I figured maybe he would be on the sleeker side as an adult,” the poster said.

“Fast forward a couple of years, and he turned into such a floof, especially during winter, like the clip here, when his coat is thicker to cope with the cold weather. Although he looks huge, he’s actually on the small side for his breed.”

The owner said that George only weighs 13 pounds, is active, and is generally very healthy. “It really just is all fluff,” she added. “He needs daily combing to keep himself mat-free and to help reduce the number of hairballs.”

A Pango Vet article medically reviewed by Dr. Amanda Charles says that, generally, healthy adult rag doll cats can weigh between 12 and 21 pounds.

Most of their growth usually happens during the first 18 months of their life, although these cats often don’t fully mature until they are 3 to 4 years old. Their size is usually affected by genetics, nutrition, and even neuter status.

Despite their size, rag doll cats are usually very gentle and calm. In a Vets Love Pets article, Dr. Jane Miller says that their affectionate demeanor and adaptability make them ideal pets for various households.

These cats thrive in indoor environments, and don’t require much exercise, which makes them perfect even for apartment living.

The video quickly went viral on social media and has so far received over 19.8 million views and more than 4 million likes on the platform.

One user, Jelly Bean, posted: “He’s so fluffy he’s onigiri-shaped!”

Nat Geo Animals commented: “Sir George really said ‘wanna bet?”

California_Jay_Way added: “That’s one serious Pokémon evolution.”

Do you have funny and adorable videos or pictures of your pet you want to share? Send them to life@newsweek.com with some details about your best friend, and they could appear in our “Pet of the Week” lineup.