Entertainment TV Kylie Jenner Jokes That She Grew Up Too Fast with Instagram Throwback: 'Dammit, Kylie!' The 17-year-old reality star posted an old picture of her on Keeping Up with the Kardashians By Aurelie Corinthios Published on July 15, 2015 01:50 PM Share Tweet Pin Email Trending Videos Photo: John Salangsang/Invision/AP Kylie Jenner has admitted she grew up too fast – albeit in a teasing Instagram post. The Keeping Up With the Kardashians star, 17, shared a screenshot from an old episode of show Tuesday. “I promise that I won’t grow up too fast,” reads the subtitle for the shot of younger Kylie. The reality star cheekily acknowledged that she might have gone back on her promise when she captioned the Instagram, “Dammit, Kylie!” with a “crying tears of laughter” emoji Tuesday night. Kylie was 10 years old when KUWTK premiered in 2007. Her every move has been documented by E! cameras – and the media – ever since. Recently, she has found herself slamming rumors of drug use and pregnancy, insisting that she’s not the “wild child” people make her out to be. RELATED VIDEO: Kylie Jenner’s Snapchat Slip-up Kylie has also weathered speculation about her physical appearance, notably her perfectly plump lips, and recently confirmed they are enhanced with temporary lip fillers. “I want to encourage people/young girls like me to be YOURSELF & not be afraid to experiment w your look,” she Tweeted in April. RELATED VIDEO: Forget the Kylie Jenner Challenge, Here’s How You Really Get the Perfect Pout The teen will celebrate her 18th birthday on Aug. 10.