Kylie Jenner, the youngest of the Kardashian-Jenner siblings at only 17 years of age, is finally spilling the beans and putting to rest the issue behind her plump lips.

On the upcoming episode of "Keeping Up With the Kardashians" to be aired this Sunday, the teen admits to having a cosmetic procedure done on her lips to make it fuller, the Mashable  reports.

Just recently, the #KylieJennerChallenge on Twitter has gotten some attention when some of the teens who posted selfies after using shot glasses and bottles to imitate Kylie's lips experienced adverse effects on their faces.

Bruce Jenner's daughter responded by saying that she doesn't wish for others to try to look like her, and encourages them to embrace their individuality.

I want to encourage people/young girls like me to be YOURSELF & not be afraid to experiment w your look. ❤️❤️❤️

— Kylie Jenner (@KylieJenner) April 21, 2015

The young TV personality revealed that she had some inhibitions on telling the truth about her lips because she was anticipating the possible mud-slinging that would ensue, according to ET Online.

"I have temporary lip fillers, it's just an insecurity of mine and it's what I wanted to do. I'm just not ready to talk to reporters about my lips yet because everyone always picks us apart.

"I want to admit to the lips but people are so quick to judge me on everything, so I might have tiptoed around the truth, but I never lie," Kylie shared.

Khloe Kardashian, playing out the big sister's role quite well for Kylie, advises the young teen to own up with regards to her decision to undergo a cosmetic enhancement.

"Kylie decided to plump her lips and I don't think there's anything wrong with that. I think if you've done something though, it is right to own up to it or you'll look like a liar," she said, as reported in the OK! site.

Other members of the Kardashian clan have also been heard touching on the topic in the recent past.

Kim Kardashian was quoted in saying that her younger sister's pouty lips were just an effect of her use of lip liners. "I go into her room and I'm like, 'What liner do you wear?' because she only wears lip-liner and then she fills it in. She doesn't wear a lipstick or a gloss," Kim said in an interview back in October last year, the ET Online also notes.

Scott Disick revealed, also in one of the episodes of KUWTK, that the lip transformation of Kylie was not some quick fix, as told in another article by the ET Online.

Kourtney Kardashian's boyfriend said, "Have you seen her do her lipstick? It takes like 40 minutes, and then she, like, pulls one lip, pushes one out."

"I don't understand why everybody thinks it's so cute to duck [your lips] out!" he added.