Lisa Rinna and Eileen Davidson–both actresses with deep Days of Our Lives roots–engaged in a screaming match at a cocktail party hosted by Kyle Richards recently. The common denominator here is, of course, the Real Housewives of Beverly Hills. And it appears as though a couple of these housewives are already amping up the drama.

RadarOnline reports that Eileen Davidson even left the party and that Lisa Rinna now wants revenge.

A source told RadarOnline that Lisa Rinna started the whole thing by confronting Eileen Davidson–in front of the entire RHOBH cast.

“Lisa went up to Eileen and said, ‘I don’t know what you have against me, but I’m tired of your evil eye dirty looks. You need to stop it!’” the source says.

“Eileen said, ‘Who do you think you are? I barely know you!’”

“Eileen stormed out and couldn’t believe Lisa would stoop to that level,” the source adds. “Eileen has been nice and quiet, but people knew behind that was a catty girl. So Lisa was antagonizing her until she exploded. Now Lisa is conspiring to bring her down.”

It seems tension between the two started long before Kyle Richards invited them to her cocktail party this past week.

Lisa Rinna and Eileen Davidson Bringing "Heated Exchanges" to RHOBH — Report http://t.co/WybXV5X9x3

— Real Housewives BH (@RHOBHWetpaint) August 8, 2014

“Whenever they would go to an event they would give each other looks,” the source explains.

Next week could prove to be a replay of this screaming match between Lisa Rinna and Eileen Davidson, as both are scheduled to appear at a ladies’ get-together and work out their differences.

“The problem is Eileen has no interest in speaking to Lisa right now and may not go,” the source adds.

It seems the producers at Bravo have now gotten just what they wanted. Prior to this screaming match between Lisa and Eileen, it seems they feared the two might be boring additions to the Real Housewives of Beverly Hills.

“When they were cast the other cast members were wondering if they were going to act or actually be real. Producers hired these girls to bring the drama and got concerned because they weren’t bringing what was expected of them,” the source shares. “But now it’s on.”

Lisa Rinna and Eileen Davidson are no strangers to drama. When Lisa appeared on Days of Our Lives in her role of Billie Reed, drama followed her at every twist and turn. And Eileen Davidson is presently embroiled in Days of Our Lives drama as Kristen DiMera–the daughter of the evil Stefano DiMera.

Oh, yes. These ladies know drama. Will it ensue next week when the Real Housewives of Beverly Hills ladies meet yet again? Might Lisa Rinna call a truce or will she once again light into Eileen Davidson?