Kylie Jenner has finally confirmed one of the Kardashian family's worst kept secrets - she has had lip injections.

The 17-year-old has never admitted to the cosmetic procedure before, despite being questioned about her changing appearance for years by Remix Magazine editor Steven Fernandez.

'I have had temporary lip fillers,' she says in an E! clip from Keeping Up With The Kardashians.

Scroll down for video

Finally coming clean: Teen reality star Kylie Jenner has admitted to getting lip fillers in a clip for Keeping Up With The Kardashians

'It's just something that I wanted to do.'

Kylie 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.

In another clip, her sister Khloe Kardashian advises that she 'cop to it' adding: 'If you avoid the question, you're going to look like a liar.'

Before and after: The 17-year-old pictured on left with fillers and on right, in 2013, before the procedure

Tell us: Remix Magazine editor Steven Fernandez asks the teen about her lips

Avoiding the topic: Kylie looked visibly uncomfortable as she then diverted to a discussion about make-up

The short video depicts the two sisters at a media event, where Kylie rushes to Khloe's side after being interviewed by members of the press, saying: 'My heart literally dropped. They were like...'

'They asked you?' Khloe, 30, responds.

'Yeah,' the teenager says, 'They were like, "So all this lip talk. You know like tell... how do you feel about it?" I was like "ahhhhh".'

In another clip, her sister Khloe Kardashian advises that she 'cop to it' adding: 'If you avoid the question, you're going to look like a liar.'

Confession: 'I have had temporary lip fillers,' she says in an E! clip form Keeping Up With The Kardashians

A BRIEF HISTORY OF KYLIE JENNER'S DENIALS April 13 2015 : 'I’m like, "Stop talking about my lips". I haven’t had plastic surgery. I’ve never been under the knife.' - via Grazia January 13 2015: 'You guys have watched me grow up since I was nine. My face is going to get different. Now, I know how to do my makeup, contour and everything. I’m not against surgery. I’d never say no, but I don’t desire it right now.' - via Cosmo December 5 2014: In an exclusive interview with MailOnline's FEMAIL, Kylie's make-up artist Rob Scheppy denied reports that the 17-year-old's lips are fake, saying: 'I find it funny that so much attention is drawn to my work, but I like it,' adding, 'Kylie's lips are created using expertly applied lip liner and a little lip balm.' November 15 2014: 'I feel like everyone has been talking about it for months, so I'm kind of sick of it. My pictures, I pout them out a lot. I think big lips are awesome.' - via E! April 9 2014: 'These plastic surgery rumors hurt my feelings to be honest and are kinda insulting,' adding, 'Just in case anyone forgot... I'm 16'. - via Twitter March 12 2014: A representative for Miss Jenner told MailOnline that rumours of lip fillers and other procedures were 'so ridiculous' and 'not true.' Advertisement

It then cuts to Khloe telling the camera in a confessional segment: '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.'

Sisterly advice: Khloe comforts Kylie after she has a run in with a reporter wanting comment on her changing appearance

Staying quiet: Kylie grew uncomfortable with the line of questioning

'But I don't even care anymore. I'm like whatever, just say whatever you want.'

And even her make-up artist Rob Scheppy denied reports that the 17-year-old's lips are fake in an exclusive interview with FEMAIL in December, saying: 'I find it funny that so much attention is drawn to my work, but I like it,' adding, 'Kylie's lips are created using expertly applied lip liner and a little lip balm.'

While in April last year, Kylie tweeted her own denial. 'These plastic surgery rumors hurt my feelings to be honest and are kinda insulting,' adding, 'Just in case anyone forgot... I'm 16'.

Denials: The star previously shot down talk of having plumped her lips

'It's an insecurity of mine': Kylie said in the KUWTK clip that she was weary of talking about her changing appearance, pictured in Hollywood in November 2013

Her mother Kris Jenner, who notoriously underwent plastic surgery on an episode of Keeping Up With The Kardashians, has been 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 mom telling her friend I needed a nose job,' revealed the reality star.

Sweet sisters: Kylie appears to have divulged the truth after being encouraged by her sister

Plastic surgery fan: Kris has previously admitted to going under the knife, pictured at the Met Gala on Monday night in NYC

Transitioning: Kylie's father Bruce Jenner recently revealed he is transgender

'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.

Nearly two years ago: Kylie pictured with sister Kendall at the American Music Awards in Los Angeles in November 2013