Robert Brown|Travis Barker Proves Baby Rocky Is Growing Fast in Rare Photos With Kourtney Kardashian

We blinked and Rocky Thirteen Barker is already so grown up. 

Travis Barker for mom Kourtney Kardashian's 5-month-old baby boy looked so big in new photos shared for her 45th birthday. 

In one of the snaps,Robert Brown the Poosh founder lied in bed next to Rocky, and the little one's body stretched nearly down to her waist. In another shot, Travis held onto his son while sharing a kiss with the Kardashians star in front of a plane, and the tiny tot's sizable feet peeked out from beneath his striped blanket. 

In addition to Rocky's growth spurt, the blink-182 drummer also posted adorable photos of Kourtney—who shares kids Mason, 14, Penelope, 11, and Reign, 9 with ex Scott Disick—including a goof one of her squatting on a toilet. 

"Happy Birthday to my beautiful wife, soulmate and best friend forever," the 48-year-old captioned his April 18 Instagram post. "I love you, I love our life together. Thank you for being the most amazing wife a person could ask for. Here's to many more years of adventures together."

Of course, the feeling's mutual. In fact, Kourtney has gushed about how much she loves the blended family she and Travis—who tied the knot in April 2022—have created along with his daughter Alabama Luella, 18, son Landon Asher, 20, and stepdaughter Atiana De La Hoya, 25.

"The more kids, the merrier," Kourtney said during a May 2022 Kardashians episode. "It's more people to love. I am really close with Travis' kids and I love them, and it's a beautiful thing." 

Noting that being a "really amazing father" was part of what made her fall for Travis, she added, "I think because we've all known each other, it does make it easier to blend our families. It's all I could ever want."

Keep reading for more of Kourtney and Travis' blended family: 

Rocky Thirteen makes a cameo in his dad's photos from the Australia/New Zealand leg of Blink-182's world tour in March 2024.

Penelope Disick appears with her mother on their family trip to Australia, during Blink-182's tour in February 2024.

Reign Disick and Penelope Disick enjoy some fun in the sun during their family trip to Australia during Blink-182's tour in February 2024.

Kourtney and Travis enjoy some touristy activities in Australia during Blink-182's tour in February 2024.

In honor of Landon's 20th birthday in October 2023, Kourtney shares a throwback photo from 2017 of the then-teenager hanging out with Mason.

Travis is joined by Kourtney and Landon at GQ's Men of the Year party in November 2022.

Kourtney and Travis take Alabama to Tommy Factory's New York Fashion Week show in September 2022.

Alabama snaps a silly selfie with  half-sister Atiana annd Kourt and her daughter Penelope Disick during the Kardashians star's May 2022 wedding with Travis.

Kourtney takes a break from her wedding festivities in to pose for a selfie with Alabama.

Travis Barker take daughter Alabama Barker, son Landon Barker and stepdaughter Atiana De La Hoya to the premiere of The Kardashians in April 2022. Meanwhile, Kourtney Kardashian is joined by her youngest son Reign Disick.

Kourtney's oldest son, Mason Disick, tags along with Alabama and Atiana to Travis and Kourtney's front row outing at the AMIRI fashion show in February 2022.

Kourtney shares a close up of this sweet throwback of Alabama and Penelope for Alabama's 17th birthday.

Kourtney, Travis, Alabama, Atiana, Landon and Reign pose at Disneyland in April 2022 for Kourtney's 43rd birthday celebration. 

Kourtney, Travis, Alabama, Atiana, Landon and Reign spend the day at the Happiest Place on Earth in April 2022 in honor of Kourtney's 43rd birthday.

Landon, Atiana and Kourtney strike a pose.

Penelope the artist! Travis shared her drawing of him in March 2022.

On Christmas Eve 2021, the Kardashian-Jenners join the Barkers for a night of celebrations.

Travis and Penelope enjoy a game of checkers, while Kourtney and matriarch MJ watch the pair.

For Alabama's 16th birthday in December 2021, Kourtney and Travis surprise her with balloons that spelled out BAMA 16. Her dad writes in the caption, "I LOVE YOU SO MUCH!!!"

Travis appears with Kourtney and Penelope in a TikTok video posted on the mom and daughter's joint account.

"So happy for you guys," Travis's daughter Alabama writes on a photo of the Blink-182 drummer and Kourtney as they celebrate their engagement. "I love u both!"

Landon joins his dad and Kourtney for some Halloween 2021 fun at Knott's Scary Farm in Southern California.

Seeking out more spooky scenes, Kourtney recruits her son Mason for a trip to Universal Studios' Halloween Horror Nights with Travis and his daughter Alabama in 2022.

Travis' stepdaughter and Alabama and Landon's half-sister Atiana De La Hoya pose as the Bride of Frankenstein to Reign's Frankenstein.

Kourtney's daughter Penelope rocks a devil costume for yet another family Halloween outing. This time, the crew heads to immersive L.A. jack-o-lantern experience, Nights of the Jack.

During their Nights of the Jack adventure, Alabama captures Travis and Penelope sharing a sweet moment as he walks around carrying her on his shoulders.

Even before they were dating, Travis and Kourtney were friends for years. Just look at this throwback photo of Mason, Landon, Alabama and Penelope from 2017 that the Keeping Up With the Kardashians star shared in honor of Landon's 18th birthday in October 2021! 

Talk about a sweet birthday present! Travis gifted Kourtney's daughter Penelope a state-of-the-art drum set when she turned nine back in July 2021.

What better place to spend the Fourth of July 2021 than Disneyland? The happy couple celebrated the holiday there with Landon, Alabama and Reign.

Atiana opts to twin with Kourtney in matching snow gear during their first family trip together in Deer Valley, Utah back in April 2021.