Kyle Richards has shaded Real Housewives of Beverly Hills OG, Lisa Vanderpump once again.

Kyle appeared on a recent episode of 'Watch What Happens Live' with Andy Cohen alongside costars, Lisa Rinna and Teddi Mellencamp.

Cohen asked the women who he felt was the biggest mean girl, and Kyle was ready with the answer:

“I think that — [Well], I don’t know if ‘mean girl’ is the right word, but obviously we have an issue with Lisa Vanderpump, so … I don’t think anyone’s mean — that’s not the right word — but that’s been the heart of what’s happened between all of us that caused a lot of the main problems.”

The women have reportedly refused to film with the ladies on the upcoming season of RHOBH and Vanderpump was even blasted for refusing to attend Cohen's baby shower unless she was getting paid.

Kyle reportedly even told TMZ that she was “more worried about the dogs than the bitches” 

The former besties appear to now be bitter rivals, but we doubt that Vanderpump is too bothered. She has her own show, 'Vanderpump Rules' on Bravo which pulls in very good ratings.

Season 9 of RHOBH kicks off on Feb. 12 at 9 pm on Bravo.