Rocky Thirteen Barker, meet Rocky Balboa.
On the occasion of Kourtney Kardashian and Travis Barker's son's first birthday, baby Rocky was given a very unique present from the one and only Sylvester Stallone—the writer and star of the 1976 classic Rocky: a handwritten note made out especially to him.
"One of the most special Birthday gifts," Travis wrote on Instagram Stories Nov. 4 alongside a snapshot of the one-of-a-kind letter, which was written on Sylvester Stallone's stationary. And according to the Blink-182 drummer, Kris Jenner was behind the over-the-top gift, as he added, "thank you @krisjenner @officialslystallone."
As for the card itself, it read, "Dear Rocky, My name is Rocky too. Your name is very special and is identified with wonderful things."
The Oscar nominee noted that while "life has many challenges you will face," he encouraged the 12-month-old to "show dedication and determination!"
"You must never give up on your dreams, never!" Sylvester added. "Now most importantly, you must always value family, friendship and loyalty over fame and fortune!"
He ended the message with, "Keep punching, Sly 'Rocky Stallone," a nod to his character Rocky's career as a boxer in the Oscar-winning film.
The birthday card was especially meaningful for Travis, who had previously revealed that the film was one of the inspirations behind his son's name, telling Complex in July of last year that he considers it "the greatest boxing movie of all time."
The 48-year-old explained the name was also a tribute to Suicidal Tendencies guitarist RockyGeorge. And as for middle name Thirteen? Travis joked, "13 is just the greatest number of all time."
Fittingly, Rocky was the 13th grandchild born into Kris' family, which she noted in her birthday tribute to her grandson.
"I can't believe you are already a year old!" she wrote on Instagram Nov. 1, alongside several photos of Rocky. "It feels like just yesterday that we were welcoming you to the world. You are grandchild number 13 and the most precious little smiley boy I have ever met!!"
She added, "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."
But Rocky is hardly the only one in his family with a unique moniker, as his parent's blended family includes Mason Disick, 14, Penelope Disick, 12, and Reign Disick, 9—who Kourtney shares with ex Scott Disick—as well as Travis' children Landon Barker, 21, Alabama Barker, 18, and stepdaughter Atiana De La Hoya, 25, who he coparents with ex-wife Shanna Moakler.
For a look back at Rocky's first year, keep reading.
Live Like Jack and Sally
For Halloween 2025, Kourtney Kardashian and Travis Barker dressed up as Sally and Jack from The Nightmare Before Christmas, while their son Rocky Thirteen Barker served as Zero.
What's This?
All hail the Pumpkin King's baby boy!
Little Pumpkin
Kourtney posted this adorable photo of Rocky behind the wheel in October 2025.
Look Both Ways
Travis showed his son how to safely cross the street while traveling for his and Blink-182's Missionary Impossible Tour in August 2025.
Big Foot Forward
The tiny tot took a giant step toward a menacing cutout of Sasquatch, proving he's not afraid of the fictional figure.
Rocker in the Making
Rocky made it clear he's taking after dad Travis by playing drums in July 2025.
That's Amore
Rocky even brought along a ukulele while on vacation in Portofino, Italy, in July 2025, with Kourtney captioning the moment, "When the moon hits your eye like a big pizza pie."
Playtime With Mom
Rocky sported some leopard print while playing with his mother, as seen in this pic the drummer shared on Instagram in honor of his wife's 46th birthday in April 2025.
Beach Vacay
Kourtney and her baby boy enjoyed a quiet moment in the shallow ocean.
Celebrating Mom's Birthday
During her 46th birthday trip in 2025, Kourtney took a break from reviewing some home renovation plans to enjoy the view from their private jet with her baby boy.
Beach Stroller
Kourtey and Travis walked hand-in-hand with their son while on the beach in a February 2024 Instagram post.
Little Drummer Boy
In January 2025, Travis showed that his son was following in his footsteps when he posted this pic of Rocky behind a mini drum set.
Tiny Learner
Rocky was deep in a book, reading all about the Pixar movie Inside Out 2 in November 2024.
Catching Some Rays
The Kardashians star took her son for a beach walk, as seen in an Instagram photo she shared in November 2024.
Disney Dad
On Rocky's first birthday, Travis took his son to meet Mickey Mouse at Disneyland.
House of Mouse
The baby boy got to take home his very own Mickey Mouse balloon during his visit to the Happiest Place on Earth.
Around the World
Rocky played with some unique toys, embracing a globe bouncy ball and a skeleton prop ahead of Halloween.
Bat Baby
For Rocky's first Halloween, Kourtney and Travis dressed him in a sweet bat onesie.
Spook-tacular
At 11 months, Rocky also sported a skeleton outfit for Halloween 2024.
By the Shore
The couple took Rocky to the ocean in an October 2024 snap.
Growing Up Fast
He took in the views in September 2024.
Spot the Tot
The reality star bundled up in a cheetah print coat as she carried Rocky in this snapshot shared by Travis in September 2024.
Miss You
The Blink-182 drummer kissed his baby boy on the cheek in this September 2024 picture.
Mother-Son Selfie
Say cheese! Kourtney snapped a breastfeeding selfie with Rocky in September 2024.
Tour Life
In August 2024, Kourtney shared photos from the road as the family joined Travis on Blink-182's summer tour, including this snapshot of herself nursing Rocky backstage.
Aliens Exist
Rocky had a blast riding on an UFO buggy backstage at a Blink-182 show.
Father's Day Tribute
"Happy Father’s Day @travisbarker !!" Kourtney wrote to Travis on Instagram on Father's Day 2024, sharing never-before-seen pics of her husband with their son. "Beyond grateful for the Dad that you are to our baby boy, and all of our kids."
Kisses for Baby
The reality star continued, " You keep us safe and protected and take care of us. Having a family with you is heaven. Happy to celebrate you!"
Sun Day, Fun Day
Kourtney also included this pic of Travis and Rocky in her Father's Day tribute.
The Parenting Show
Travis' daughter Alabama shared this photo of the couple with baby Rocky in June 2024.