It's been reported that Brandi Glanville and Lisa Vanderpump have a falling out in the upcoming Real Housewives of Beverly Hills Season 4, but it now appears that Brandi will have another fierce feud with a cast member this season.

Brandi has been slamming new co-star Joyce Giraud on Twitter in the past week, and now Joyce is responding.

On October 17, when a Twitter follower told Brandi about being excited about meeting the show's two new ladies — meaning Joyce and Carlton Gebbia — Brandi responded, "Make new friends but keep the old — one is evil, & the other's gold."

So just who exactly is this "evil" person? Well, some people on Twitter assumed Brandi meant Lisa, but Brandi quickly cleared it up. "I've NEVER said @LisaVanderpump is evil in my life," Brandi writes. "I was talking about @joyce whatever her name is."

So what does Joyce Whatever Her Name Is have to say about this? A lot, actually, as she posted a photo on Instagram on October 18 of the words, "Keep calm cause haters gonna hate."

As a caption to the poster, Joyce writes, "This is all I have to say for now. As for the ugly soul who says I'm trying to 'make a storyline,' I'm not the one bringing it up every week even before the show starts :)"

"HAVE A LIFE!!!!" Joyce continues about Brandi. "It's very sad that your inside will never match your external beauty."

Whoa! And so the saga continues. So what caused the issue? We're guessing it has something to do with Joyce telling Brandi she needs rehab in the Season 4 promo. But we can't wait for the season to start already so we can find out for sure.

Source: Instagram