Filming has just started for Real Housewives of Beverly Hills, but the ladies are reportedly already bringing the drama to Season 5 of the Bravo show.

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According to Radar Online on Friday, new cast members Lisa Rinna and Eileen Davidson are already a part of the show in a big way."There is absolutely no love lost between Lisa and Eileen. Eileen can be very cold and aloof towards other women, and Lisa doesn't like that at all. Lisa is very outgoing and says whatever is on her mind," a source told the website about the two actresses. "The ladies have already had some heated exchanges during the onset of filming."

Davidson and Rinna know each other from their time on Days of our Lives. The site also reported that Rinna wasn't sure exactly why Davidson joined the reality show."Eileen said she quit DOOL to spend more time with family, but then invites reality cameras into her house?" a source said, "There is a lot going on with Eileen's personal life, and just doesn't seem like the best decision to join a reality show."

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Davdison and Rinna are joining current housewives Yolanda Foster, Lisa Vanderpump, Kim Richards, Kyle Richards and Brandi Glanville on the reality show. Adrienne Maloof also revealed recently that she was going to be making a few appearances.

"It just made sense to maybe take this and come full circle from where I left off last time," Maloof told Us Weekly. "I'm coming back, also, a bit wiser. I know what to expect now. There were some unfinished situations that I felt the need to kind of mend and come full circle."