Los Angeles, June 1 (IANS): Reality TV stars Kendall Jenner and Kylie Jenner are terrified with the idea of growing up.

"I'm scared of the day I turn 19. I really don't want to grow past 18," 17-year-old Kylie told Style magazine, reports femalefirst.co.uk.

Speaking to her 19-year-old sister Kendall, Kylie added: "You'll be 20 this year, that's crazy. And any second you'll be, like, 21, 22, 23..."

Kendall, who is currently forging a career as a fashion model, agreed with her sister and explained that her fear comes from not being able to stop time, which she finds especially difficult because of "how fast everything is" happening to her.

Kendall said: "It's scary. 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."

The "Keeping Up with the Kardashians" stars commented on how much they have changed aesthetically in the past 12 months.

"You see a picture and you've changed so much in a year. I've done so much, physically and whatever," Kylie said.