Tristan Thompson paid tribute to his eldest child, son Prince Oliver Craig Thompson, on his 4th birthday.
"Happy birthday Princey!!!" Tristan wrote. "I'm soo lucky to have you as a son papa. Your heart and soul is pure gold. Your sister is soo lucky to have a big brother like you to watch and protect her. Daddy Loves you baby boy."
Khloe, 36, liked the post and also commented with six heart emojis.
Prince's mother and Tristan's ex, Jordan Craig, also paid tribute to their son on Instagram. She shared photos of the two posing in front of a horse-drawn Christmas sleigh and wrote, "To the most BRILLIANT, Loving & Kind son a Mum could ever ask for..Here's to another year & many more to come! #theBIG4."
Tristan occasionally posts photos of his son on Instagram, mostly on his birthday. In 2018, he delighted fans with pics showing himself with both Prince and then-2-month-old True.
The NBA's preseason games recently started and this year, Tristan is playing for the Boston Celtics after departing the Cleveland Cavaliers and reaching a two-year $19 million deal to play for the new team. Over the past few months amid the pandemic, he has been with Khloe and True in Los Angeles.
The reality star publicly expressed her support for him last week after he shared an official photo of him wearing a Celtics' green jersey with his number 13 on it. Khloe wrote, "Wooooohoooooooooo" in one comment and dropped four leaf clover emojis in another.