"The Real Housewives of Beverly Hills" filming has begun, which means that drama amongst the ladies is in full swing.

Soap stars Lisa Rinna and Eileen Davidson have already brought on some conflict during filming, according to the website irealhousewives.com.

"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 RadarOnline.

The insider added, "The ladies have already had some heated exchanges during the onset of filming."

Lisa Rinna reportedly points out the fact that Eileen Davidson chose to leave "Days of Our Lives" to spend time with her family, but has still decided to join RHOBH.

"Eileen said she quit DOOL to spend more time with family, but then invites reality cameras into her house? 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," the insider added.

While drama amongst the ladies escalates, there have been shocking reports that RHOBH cast member Kim Richards had been in custody of another child five years ago, according to RadarOnline.

The entertainment website reports that Kim Richards was given custody of her family friend Casey Johnson's 3-year-old daughter, Ava-Monroe, before the then 29-year-old heiress reportedly had to check into rehab.

"Casey turned Ava over to Kathy [Richards'] sister Kim, who had her own long history of alcohol addiction," author of a 2013 tell-all book, Jerry Oppenheimer, writes.

Richards was reportedly such a great mom to little Ava that she began calling the RHOBH star "mommy," which sparked Johnson to take her daughter from Kim and put her in the care of British socialite Jasmine Lennard, according to the book "Crazy Rich: Power, Scandal, and Tragedy Inside the Johnson & Johnson Dynasty."