Kim Kardashian West defends Kylie Jenner

Reality TV star Kim Kardashian West says Kylie Jenner "didn't lie" about having lip fillers.

The 34-year-old star says her 17-year-old half-sister, who has confirmed that she boosted the size of her pout with surgical injections after previously claiming it was the result of clever makeup, looks beautiful.

"She didn't lie, it took her a while to actually make that decision to do it and once she decided to plump them, she was still over-lining, then sometimes it would look too big, then she figured out to stop over-lining.

"She plumped them and she was happy with it. People think 'Oh my god she lied for so long - now she's finally come clean' but that's not really the case, it took her a while to do it," Kim told accesshollywood.com.

Kim also says that Kylie, who is dating 25-year-old rapper Tyga, has never been happy with her lips.

"At 10 and 11 years old she'd say 'Kimmy, how come my lips aren't as big as you guys?' So if it's going to make her feel better about herself, I'm all for it. I think she looks beautiful," she said.

The teenager decided to come clean on her family's reality series "Keeping Up With the Kardashians", after her other half-sister Khloe Kardashian, 30, urged her to tell the truth.