Let the cat fights begin!

Lisa Rinna will be joining the Real Housewives of Beverly Hills cast for the upcoming season of the Bravo reality show, Us Weekly reports.

The Dancing with the Stars alum has already begun filming scenes with the rest of the cast, and cameras were most recently rolling as she celebrated her birthday on July 11th at co-star Lisa Vanderpump's new West Hollywood restaurant Pump.

So how exactly does she fit with the rest of the ladies? "Lisa has been friends with Kyle Richards and Lisa Vanderpump for years," a source dished to the mag. Two people who won't be meeting the newest 90210 vixen? Carlton Gebbia and Joyce Giraud, who were given the boot after only one season on the hit show.

The addition of a new hot chick probably isn't going to go over well, and we can't wait for the drama that ensues!