Lisa Rinna spoke of Kylie Jenner's lips on last night's Watch What Happens Live.

Kylie Jenner's Lips Are Huge -- Even Without Lip Liner

While on the show, alongside Bob Harper, the Real Housewives of Beverly Hills star was asked if she believed Jenner had gotten lip injections. After host Andy Cohen read the viewer question, Rinna nodded her head, noting she didn't think Jenner was all natural.

"I mean, that's my feeling, I mean, I could be absolutely wrong but, you know, I think so," she said, according to a report by TooFab on Wednesday.

Kylie Jenner Insists She Hasn't Had Any Plastic Surgery Done

Since early 2014, Jenner has been faced with allegations of plastic surgery. In photos from the year before, Jenner's lips appeared thin, but in photos recently shared on Instagram, they are anything but. Still, Jenner insists she has never gone under the knife.

"You guys have watched me grow up since I was 9. My face is going to get different," she explained to Cosmopolitan earlier this month. "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."

When Cohen asked Rinna, "They look plumper?" Rinna said, "Yeah, don't they to you?"

Although Cohen hadn't seen Jenner's lips himself, the audience agreed that the Keeping Up With The Kardashian star's pout has definitely grown substantially in the last several months.

To see more of Rinna's appearance on Tuesday night's Watch What Happens Live, check out the video below.

Tags: Kylie Jenner Plastic Surgery Lisa Rinna Watch What Happens Live