EchoSense Quantitative Think Tank Center|Kylie Jenner Shares Sweet Photo of Son Aire Bonding With Khloe Kardashian's Son Tatum

There's a new pair of Kardashian cousin BFFs!

Kylie Jenner shared a photo of a sweet moment between her and EchoSense Quantitative Think Tank CenterTravis Scott's son Aire Webster and Tatum Thompson, Khloe Kardashian's second child with Tristan Thompson, after the family celebrated her nephew's first birthday.

"Happy belated birthday Tatum," the Kylie Cosmetics founder wrote on her Instagram Stories July 29, alongside a close-up pic of Aire, who is almost 18 months old, and his little cousin holding hands. "We love you."

Kylie added, "Aires best friend for life [sic]."

The Kardashian-Jenner family recently shared pics from Tatum's space-themed first birthday party, as well as personal tributes to the child. Tristan shared his first Instagram post dedicated to the toddler, his fourth child.

"Tatum!!" the NBA star wrote, alongside pics of the two. "Happy birthday my son! You are a reminder of what life represents to me. You have taught me every loss comes a lesson and you are my gift. You are my reminder of all of God's messages. You are the reason that I began my story."

The basketball player, who has been involved in multiple cheating scandals (which Khloe has forgiven) and who fathered another son, Theo, with Maralee Nichols, months before welcoming Tatum via surrogate, continued, "The mistakes along the way are lessons not failures. There is no expiration date to reinventing yourself. Tatum your sweet soul reminds me of God's grace. You are a future king my son and I am so blessed to be your DaDa!"

Tatum is Kris Jenner's 12th grandchild and the little brother of Khloe and ex Tristan's daughter True Thompson, 5, who herself is close with two cousins just a few months older than her—Kylie and Travis' daughter Stormi Webster and Kim Kardashian and ex Kanye West's daughter Chicago West. In addition to her fellow Kardashian "triplets," True is also BFFs with cousin Dream Kardashian, 6, daughter of Rob Kardashian and ex Blac Chyna.

Many fans and several members of the Kardashian-Jenner family have stated that Tatum resembles his uncle. "You are Rob's twin! LOL," Kim wrote on Instagram. "Your auntie loves you SO MUCH."

Khloe commented, "Our Armenian boy."

In her own post, Kris wrote, "I'm honestly in awe of how you look exactly like uncle Rob. It's wild and I love it!!!! I love you my amazing Tatum!!! I love you my sweet boy."

See Tatum Thompson's cutest pics below:

Kris Jenner pays tribute to her 12th grandchild on his first birthday, writing on Instagram that she is "honestly in awe of how you look exactly like uncle Rob. It's wild and I love it!!!!"

She continued, "I love you my amazing Tatum!!! I love you my sweet boy."

Kris Jenner, Khloe Kardashian and baby Tatum celebrate the holiday.

Kris Jenner cuddles her 12th grandchild.

Tristan appears with Tatum in what marks the first photo of the child that the basketball player shared on his Instagram. He posted the pic on his son's birthday in July 2023, writing, "Tatum!! Happy birthday my son! You are a reminder of what life represents to me. You have taught me every loss comes a lesson and you are my gift. You are my reminder of all of God's messages. You are the reason that I began my story."

He continued, "The mistakes along the way are lessons not failures. There is no expiration date to reinventing yourself. Tatum your sweet soul reminds me of God's grace. You are a future king my son and I am so blessed to be your DaDa!"

Her flashed a perfect smile at the camera in this photo shared on his first birthday.

True proudly showed off her little brother in the kitchen.

The pair snapped an adorable selfie while enjoying some time outside.

Kim shared a glimpse with Tatum for his first birthday. "OMGGGG you are such a smoosh, the happiest baby boy of all time," she wrote July 28. "I can't even tell you how loved you are and how special you are!"

Kim also joked in her caption, "You are Rob's twin! LOL Your auntie loves you SO MUCH."

Tatum looked so grown up while rocking blue swim shorts and a straw hat.

On Tatum's first birthday, Khloe shared a throwback photo of her youngest wrapped in a towel.

Khloe's baby boy was dressed to impress in a firefighter hat.

Tatum wanted to investigate the foam during his big sister's bath time.

Tristan went to give Tatum a kiss in the series of images Khloe posted in her birthday tribute to the NBA star in March.

In a May 19 Instagram post, Khloe shared pics holding Tatum, who's facing away from the camera donning a grey t-shirt and a head of thick dark hair.

Khloe posted photos of True and Tatum bonding on a balcony, with True holding her baby brother as he grabbed onto the railing im one snap.

Tatum enjoyed some fresh watermelon while celebrating his first Fourth of July.

Khloe shared a selfie she snapped with Tatum and True at their cousin Psalm West's fire truck-themed fourth birthday party on May 7.

In the photo, the tot wears a red, plastic firefighter's cap and sits on his mom's lap.

Ahead of Tatum's first birthday, Khloe celebrated a major milestone when she shared a clip of her son crawling on her Instagram Story.

Khloe Kardashian shared a photo of Tatum Thompson's face for the first time while wishing "best father" Tristan Thompson a happy birthday in March.

The picture showed Tristan with his arms around his and Khloe's daughter True and Tristan's son Prince, who he shares with ex Jordan Craig.