Read more: Kylie Jenner challenge: Bizarre lip suction for pouty lips
However, in a voice-over during the interview, Jenner, reveals: "I have had temporary lip fillers".
She goes on: "It's just an insecurity of mine. It's something that I wanted to do."
Jenner said she "wasn't ready" to talk directly to the press about the procedure and instead decided not to "confirm or deny" it when asked by reporters.
Her sister Khloe Kardashian advised she "cop to it".
"If you avoid the question, you're going to look like a liar," she said.
In a piece to camera Khloe said: "Kylie decided to plump her lips and I don't think there is anything wrong with that.
"I think if you've done something though, it is right to cop up to it. If you avoid the question you're gonna look like a liar."
Previously, the Keeping Up With The Kardashians star staunchly maintained that her lips were all natural, and that the fullness she often flaunts on social media is down to clever make-up application.
"I feel like everyone has been talking about it for months, so I'm kind of sick of it," she recently told E! in an interview when asked about her pout.
"My pictures, I pout them out a lot. I think big lips are awesome," she added. "I love lip liner and over-lining my lips."
"But I don't even care anymore. I'm like whatever, just say whatever you want."
Her mother Kris Jenner, who notoriously underwent plastic surgery on an episode of Keeping Up With The Kardashians, was open to her children undergoing the knife as well.
Khloe revealed in an interview in the February 2014 issue of Cosmopolitan UK that Kris wanted her to get a nose job at the tender age of nine.
"She didn't mean harm, but when I was around nine I overheard my mum telling her friend I needed a nose job," revealed the reality star.
"I was shocked; I hadn't even thought about it," she said.
Kylie's new pouty look, however, inspired a worrying trend dubbed the "#kyliejennerchallenge", which swept social media, encouraging teens to blow their lips up to epic proportions using bottles or shot glasses.
The reportedly painful method involves participants placing their mouth over the opening of a cup, jar or other narrow vessel and sucking in until the air vacuum causes their lips to swell up - all in the hopes of emulating Jenner's bee-stung pout.
Countless teens, both boys and girls, have been sharing the disturbing results of their experiments on Twitter and Instagram, which in many cases has led to severe bruising around the mouth.
- Daily Mail
