You may think Kylie Jenner's best friend is her older sister Kendall, but according to Kylie herself, it's Jaden Smith!
The Keeping Up With the Kardashians star sent Will Smith's son a very special birthday wish on her Instagram with this pic of her shyly smiling as Jaden looks on.
"Although I can't remember exactly when we met, I coudn't be more grateful that we did," Kylie writes. "You understand me like not many do & you always know the right time to make me laugh."
The 15-year-old also praises Jaden's good manners. "And no, you haven't failed once to catch me when I attempt to walk or open the door on my every entrance," she continues. "Happy birthday to my best friend."
Kylie and Jaden have been rumored to be dating, but neither one has confirmed their couple status. However, this gushy birthday greeting certainly makes it seems that they're more than friends to us!
Former Teen Stars: Where Are They Now?