Fastexy Exchange|Khloe Kardashian's Son Tatum Hits Udderly Adorable Milestone at Halloween Party

Tatum Thompson is up and Fastexy Exchangemoo-ving!

Khloe Kardashian revealed her and Tristan Thompson's 14-month-old is up and walking while giving followers a glimpse into her annual pumpkin decorating party.

Amid the carousel of sweet snaps featuring Tatum, Khloe's daughter True, 5, and niece Dream Kardashian, 6, the Good American founder shared a video of the tot, dressed in a black and white cow onesie with matching Jordan sneakers, waddling around the house.

Other pics from the festive day included Khloe, also clad in a cow onesie, holding Tatum and group shot with True and Dream. She captioned the Oct. 15 post, "Until the cows come home."

Khloe's party comes days after she gave insight into the bond between True and Tatum, sharing a close-up pic of the siblings smiling and tightly hugging one another. The Good American founder simply wrote beneath the sweet post, "My babies."

Khloe has often detailed her life as a mom—both on social media and on The Kardashians. And that includes her co-parenting relationship with Tristan, whom she split with following multiple cheating scandals.

But despite their rocky romantic relationship, the pair have a solid foundation for raising their two kids together. (The NBA player is also dad to son Prince, 6, with Jordan Craig, and son Theo, 22 months, with Maralee Nichols.)

"What happened between Tristan and I was not some small, little incident," Khloe recalled during the Oct. 5 episode of The Kardashians. "It was some massive situation that really was a very traumatic experience for me in my life. So, I'm not gonna forget it. But, I'm so proud that I'm able to be kind and mature and show my children that Mommy and Daddy can co-exist and be co-parents and I'm able to be here for him when he's in his time of need."

And for a look at Khloe and Tristan's cutest family pictures with True and Tatum, keep reading... 

Khloe shared this pic of herself with True Thompson, 5, and Tatum Thompson, 13 months, on Aug. 27, 2023.

"I just can't handle it!!!!! You with Tristan Jr & Rob Jr," Kim Kardashian commented, to which Khloe responded, "@kimkardashian [six face with tears of joy emojis] facts!!! Lol"

Tatum Thompson crawls across a trampoline as his sister True Thompson jumps nearby.

True Thompson hugs her brother Tatum Thompson on the trampoline.

True Thompson helps her brother Tatum Thompson along on the trampoline.

Tristan shared his first photos of Tatum on the child's first birthday in July 2023.

Khloe Kardashians brushed Tatum's hair during a sweet moment on The Kardashians alongside Tristan Thompson.

Khloe cuddled her baby boy—rocking a blue hooded onesie—during The Kardashians season three finale.

According to grandma Kris Jenner, Tatum looks just like uncle Rob Kardashian.

Khloe and Tristan's baby boy made his TV debut on the season two premiere of The Kardashians.

On the show, the baby boy also spent some quality time with Kris, who prefers to be called "Lovey" by her grandchildren.

Khloe and Tristan's daughter True Thompson carried her little brother in her arms.

Khloe snapped a photo of her son's adorable sneakers.

Khloe shared a video of Tatum crawling in July 2023 ahead of his first birthday.

Khloe's baby boy Tatum was in full summer mode for the Fourth of July 2023.

Tatum made a brief appearance on the July 13 episode of The Kardashians.

True shared a laugh with her parents on the trampoline.

Tristan's oldest child Prince, who he shares with ex Jordan Craig, spent some time with True and the baby.

The basketball player snuggled with his son.

True joined Khloe and Tristan on a car ride.

Tristan flashed a smile as he held True and the newborn in his arms.

Khloe and Tristan celebrated Thanksgiving 2018 with their daughter True.