Donald Trump Jr. is facing backlash for sharing bold snaps of his daughter Kai on social media.

The businessman took to his Instagram account on Wednesday to pay a heartfelt tribute to his daughter, Kai, on her 19th birthday.

"Happy birthday to my absolute favorite 19 year old child. @kaitrumpgolfer I love you and continue to be amazed at the woman you’re becoming," he captioned the post.

Donald's fiancée, Bettina Anderson, responded in the comment section, "I can’t believe you have a kid in college!" about Kai, who will start her freshman year at the University of Miami in the fall.

Alongside the heartwarming note, Donald shared a carousel of pictures that included several bikini shots of Kai, the YouTube star.

As the post went viral, several internet users criticized the American President's son for sharing bikini pictures of his daughter.

"What a horrible father and person you are," penned one user.

"Insane post given the political climate you guys have created. Do you think you’re popular or just don't care about exposing your family to vitriol?" asked another one.

A third one wrote, "Glad the Trump family and @donaldjtrumpjr are enjoying their wealth while the majority of Americans struggle."

For those unversed, Donald shares daughter Khai with his ex-wife Vanessa Trump.