Prince Oliver - who turned 1 on Tuesday - will soon have a little brother to play with in dad Tristan Thompson and Khloé Kardashian's son on the way

Prince Oliver had a splashing tribute for his birthday!

The son of Tristan Thompson and his ex-girlfriend Jordan Craig turned 1 on Tuesday — and to celebrate, the proud mom shared her baby boy’s first snapshot to Instagram.

“#MemoriesWithYou💕,” the model captioned the sweet photo, showing her holding her baby boy high in the air while the twosome enjoy time in the pool together.

Prince will soon have a little brother to play with. Thompson, 26, is expecting his second son — his first child with girlfriend Khloé Kardashian, who is due in early 2018.

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Both Thompson and Craig have been fairly private regarding their son, keeping his image under wraps and off social media until Tuesday — and even then, the shot was taken from a distance.

But Craig did offer a glimpse into her stunning baby shower in October 2016, sharing a heartfelt message for her little one on the way alongside a gorgeous video of herself showing off her baby bump in a gold gown.

“Although watching and feeling you grow every day has made my pregnancy such an unforgettable, magical experience … words cannot express how anxious and excited I am to finally meet you!” she wrote. “Mommy loves you so much. Muah-Muah-Muah!!!!”

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For her own baby shower, Kardashian “has one scheduled” and prefers for it “to be low-key like [pregnant sister Kylie Jenner]’s,” a source told PEOPLE on Tuesday, adding that her sisters and mom Kris Jenner are organizing the bash.

But before news of her pregnancy broke in September, Kardashian, 33, had already expressed her admiration for her Cleveland Cavaliers star beau’s parenting prowess.

“I would love to have a family. We’ve talked about it,” Kardashian revealed to ESMagazine in April. “He [already] is a father, and I know for a fact that he would be an impeccable father.”