Khloé Kardashian's baby daddy Tristan Thompson pens heartwarming note for son Tatum

Khloé Kardashian's former partner Tristan Thompson penned a sweet tribute in honour of son Tatum's special day.

The estranged couple marked their only son's third birthday on July 28, with a Mickey Mouse Clubhouse themed bash.

Tristan took to his Instagram on Tuesday, July 29, to share unseen snapshots from the toddler’s big day.

The 34-year-old basketball player wrote, “Big hugs and kisses for my little Tatum’s Bday! I Love you forever young king (king wearing crown, a red heart and ballon emoji).”

“This just the beginning more pics to come (shushing emoji),” furthermore, he added.

Right after a few minutes of social media update, netizens poured in their love in the comment section with heartfelt wishes. One admirer added, “Happy Birthday! You all are beautiful children!”

“Happy Birthday Young Kig (ceries of birthday emojis)!!! The cutest babies (heart eye emoji),” another user chimed in.

For the unversed, along with Tatum, Khloé's ex-partner Tristan is also proud of his seven-year-old daughter True, and his sons Prince and Theo, whom he shares with his former girlfriend Jordan Craig.

Who was Khloé Kardashian's first husband?

In 2009, Khloé Kardashian first time tied the knot with basketball player Lamar Odom, with whom she parted ways in 2016. 

RELATED: Khloe Kardashian, Tristan Thompson reunite for family outing