Smith, 15, and Jenner, 16, have been dating since March. In July, Jenner wrote Smith a birthday note.
"Although we can't remember exactly when we met, I couldn't be more grateful that we did," she wrote. "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."
Following the premiere, Jenner retweeted an interesting quote:
“@BroganBurnside: i hope you fall in love with someone who makes you question why you ever thought you would be better off alone”— Kylie Jenner (@KylieJenner) October 29, 2013
Even as Smith is enjoying romance with Jenner, the 15-year marriage of his parents, Will Smith and Jada Pinkett Smith, is reportedly having issues.
The Hollywood couple hasn’t been seen in public with one another since August and they are allegedly going through a trial separation.
Swim Week Miami Beach 2014 [PHOTOS]