Kris Jenner gifts Kourtney Kardashian's son Rocky a handwritten letter from Sylvester Stallone

Kris Jenner celebrated her grandson Rocky's first birthday by gifting him a priceless handwritten letter from Sylvester Stallone .

On Friday, Kourtney Kardashian and Travis Barker 's little boy was presented with the heartfelt note from the 68-year-old actor who infamously played the role of heavyweight boxing champion Rocky Balboa from the hit Rocky film series.

Stallone penned in his personal stationary: '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!' he finished.

The actor signed off one the sweet note, writing, 'Keep Punching, Sly "Rocky" Stallone.

Barker, the little one's father, took to his Instagram Story to share a photo of the letter and to thank his mother-in-law for the gift.

'One of the most special birthday gifts. Thank you the Blink-182 drummer wrote above the snap with a boxing glove emoji.

The self proclaimed momager reshared the photo on her Instagram Story, adding, 'Sly, you are a DREAM thank you for this amazing birthday wish for our Rocky, we love you.'

And on Rocky's birthday on Saturday, Jenner took to her Instagram page to share photos of her youngest of 13 grandchildren enjoying a beach day.

She penned in the caption: 'Happy birthday to our precious Rocky!! I can't believe you are already a year old! It feels like just yesterday that we were welcoming you to the world.'

The multihyphenate continued, 'You are grandchild number 13 and the most precious little smiley boy I have ever met!! I can't wait to watch you grow up and I am so thankful to God that He chose me to be your grandma.

'I love you so so much and I can't wait to watch you grow.

US Weekly reported that the businesswoman hosted Rocky's first birthday party, following in the family tradition.

As photos emerged from the star studded bash, the theme was Disney, complete with Mickey Mouse balloons and a merry-go-round.

Along with Rocky, Kardashian and Barker's blended family includes Mason, 14, Penelope, 12, and Reign, 9, whom Kourtney shares with ex-partner Scott Disick, as well as Alabama, Landon, 21, and Atiana De La Hoya, 25, who is Travis' stepdaughter.

Kourtney and Travis were known to be close friends before becoming romantically involved, which they confirmed by posting a picture of their hands intertwined on Instagram in February 2021 .

They would eventually tie-the-knot in the surprise Las Vegas chapel ceremony in July 2022, though it wasn't legal.

They officially married in an intimate courthouse ceremony in Santa Barbara in early May of that same year, and later that month celebrated their union one last time with a lavish wedding in Portofino, Italy.