India, May 13 -- US President Donald Trump's granddaughter, Kai Trump, has turned 18. She posted a series of pictures on Instagram to celebrate her special day. While some gave a glimpse of her private life, a few showed her hanging out in the White House and enjoying a sweet moment with her grandpa.

"17, you taught me a lot about life. 18, I hope you teach me a lot more," she wrote as he posted the pictures.

Kai Trump is the eldest daughter of Donald Trump Jr. Kai has four siblings: Donald John III, Tristan Milos, Spencer Frederick, and Chloe Sophia. Her father, Donald Trump Jr., and mother, Vanessa Trump, divorced after over a decade of marriage.

Mom Vanessa Trump dropped a comment and wrote, "We are all so proud of the young lady th...