Manchester, UK - Three years ago, Peter the cat made friends with the boy next door. Now, that friendship is delighting the internet thanks to an adorable letter written at Christmas!

Philip, a young boy from Manchester, UK, was only three when his feline friend came into his life, Gail Myerscough, Peter's owner, told Newsweek.

"As they got older, he learned how to approach him and be gentle with Peter," she explained.

That relationship grew, and the two got closer and closer each year.

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"Peter will go over and leave one of his cuddly mice on their doorstep, and then Philip will leave a cuddly toy or car for Peter on our doorstep," Myerscough revealed.

But this bond reached a whole new level right before Christmas this year, when Phillip rang Myerscough doorbell to deliver a letter he had written just for his favorite cat.

Luckily, Gail decided to share the note on X.

In his note to "Peeter," Phillip declared his love for the cat with "fllofee" fur, signing off with hearts and a sweet drawing of the recipient.

The adorable letter quickly made waves on the internet, garnering over 21,000 views.

Six-year-old Philip is still learning to write, which makes the gesture all the more amazing.

"I was watching him sitting at our table writing it and it was brilliant watching his little mind working out what he wanted to say," Gail Myerscough. "I loved the way he spelled fluffy. It's a brilliant drawing of Peter."

"It's the new thing now: correspondence with Peter."