Kris Jenner is spoiling her eldest daughter Kourtney Kardashian’s son Rocky with her ‘sweet Grandma’ demeanor.

The self-proclaimed ‘momager’ gifted Rocky a priceless handwritten letter from Sylvester Stallone, who is known for portraying the role of heavyweight boxing champion Rocky Balboa from the hit Rocky film series.

Penned in the actor’s personal stationary, Stallone extended his greetings to the birthday boy on his special day.

He wrote in the letter, “Dear Rocky, my name is Rocky too. Your name is very special is identified with wonderful things.

“Life has many challenges you will face — you will need to show dedication and determination! You must never give up on your dreams. Never!’ he added.

“Now most importantly, you must always value family, friendship and loyalty over fame and fortune!”

In the end, he signed off from the sweet note with the inspiring words, “Keep Punching, Sly “Rocky” Stallone.”

Meanwhile, Barker was quick to share the letter on his Instagram Stories, thanking his mother-in-law for the thoughtful gift.

The Blink-182 drummer wrote across the snap, “One of the most special birthday gifts. Thank you @krisjenner @officialslystallone”

The mom-of-six reshared the post on her Stories, thanking Stallone for his ‘amazing’ birthday wish to her little one.

She wrote, “Sly, you are a DREAM thank you for this amazing birthday wish for our Rocky, we love you.”