The two famous Kardashian-Jenner sisters, Kendall and Kylie Jenner from 'Keeping Up With The Kardashians' are quite bold when it comes to posing their different looks of the day on their social media accounts or the recently rumored clothing line that they are boldly undertaking, but when it comes to growing older, the two are quite hesitant talking all about it in their recent interview.

In a quick chat with U.K's Sunday Times' Style magazine the two had a tell-all story about their fear and that is, time. At their age, Kendall, 20 and Kylie, 17, it would seem like they can do anything that they set their mind to and they are apparently doing everything they can like opening their own clothing line.

But with all that, Kendall and Kylie just revealed that getting older would be their greatest fear. "I'm scared of the day I turn 19," Kylie said adding, "I really don't want to grow past 18."

Then Kylie, realizing that as she gets older, her older sister Kendall does too, telling her, "You'll be 20 this year - that's crazy. And any second you'll be, like, 21, 22, 23...It's scary," then Kendall replied saying "Life is scary."

"It's just scary to think how fast everything is rolling and you can't stop it. It's rolling right now," Kendall continued. "You see a picture and you've changed so much in a year." and of course Kylie agrees saying, "I've done so much, physically and whatever."

Despite their fears, the two have been quite the opposite as they are both taking risks and keeping up with their older sisters Kim, Khloe and Kourtney Kardashian in their fashion business as well.

Kendall, who's now established to be a famous runway and print model, Kylie on the other hand also has her own businesses like having her own hair line and now the two join forces once again, previously for PacSun and TopShop, the two will now have their own clothing line.

The two have recently opened an Instagram account for their rumored clothing line and named it @Kendall&Kylie that gained thousands of followers instantly. The two are indeed famous on social media as well each having millions of followers but the two are apparently not into it sharing, "I think social media has taken over for our generation," Kendall said adding, "It's a big part of our lives and it's kind of sad."

"I hate it sometimes, like, I literally want to throw my phone so I can't look at it," she continued. "It's all a made-up world if you think about it. Social media, everything, this interview, everything. It's not real. It's pretty crazy."