Khloé Kardashian is celebrating her birthday boy!

The reality star shared a touching tribute to her and Tristan Thompson’s “sweet son,” Tatum, via Instagram Friday as the little one turned 1.

“I am so proud to be your mommy,” she captioned the carousel. “So proud of the love and laughter we have in our house. So proud of your beautiful, gentle, loving, infectious spirit. You light up every single room.

“There’s no denying that Everyone smiles when they look at you! Especially True ????,” Kardashian, 39, continued, referencing her 5-year-old daughter. “She is so proud to call you hers.”

Although she did not mention Thompson in the lengthy post, she did compare Tatum to her brother, Rob Kardashian.

“You look soooo much like your uncle,” Kardashian wrote, noting that True’s bond with the little one reminds her of her own relationship with Rob.

In the social media upload, Tatum adorably hung out with his sister and cousins, showed off his smile and more.

The “Kardashians” star has only posted rare pictures of her child since his arrival via surrogate in July 2022, most recently showing his crawling skills.

She also chose to keep Tatum’s name under wraps until his moniker made headlines in May.

“Naming a human is really hard,” Kardashian told Kendall Jenner of the decision on an episode of their family’s show.

Later in the premiere, the Good American co-creator admitted to struggling to “connect” with the infant.

She called surrogacy a “mindf–k,” explaining, “I felt really guilty that this woman just had my baby. … It’s such a transactional experience ’cause it’s not about him.

“I wish someone was honest about surrogacy and the difference of it,” Kardashian continued. “It’s still great, it’s just very different.”

Notably, when the “Keeping Up With the Kardashians” alum welcomed True in April 2018, she gave birth to her daughter herself.

At the time, Kardashian was fresh off of finding out that Thompson, 32, had cheated on her with multiple women.

While the duo stayed together, they were rocked by another infidelity scandal in 2019 when the NBA player kissed Kylie Jenner’s friend Jordyn Woods.

For more Page Six reality TV updates

The pair broke up that time around. However, Thompson was unfaithful again after he and Kardashian reconciled and conceived baby No. 2.

As Kardashian and the athlete awaited Tatum’s arrival, he admitted to fathering a child with a woman named Maralee Nichols.

The Hulu personality called Thompson “despicable” when she discovered the betrayal, telling “Kardashians” viewers that “everything is manipulation” and “deceit” with him.

She has since clarified on multiple occasions that there aren’t any “chances” of reuniting as they continue to co-parent.