The 'Keeping Up With The Kardashians' star posted a picture and added a touching note to her "best friend", reigniting speculation they may be dating, reported Contactmusic.
"Although we can't remember exactly when we met, I couldn't be more grateful that we did. You understand me like not many do and you always know the right time to make me laugh. And no, you haven't failed once to catch me when I attempt to walk or open the door on my every entrance. Happy birthday to my best friend," Kylie wrote.
Kylie previously opened up about her friendship with Jaden, claiming they get on so well because he understands what it's like to grow up in the limelight.