Lisa Vanderpump appears to be completely estranged from the entire cast of "The Real Housewives of Beverly Hills." Although Vanderpump has long been seen as the series' unofficial star, her persona on the series reportedly changed during filming on season nine and now, she's focusing on life outside of the show.

After an Us Weekly report earlier this month suggested Vanderpump isn't talking to any of her co-stars [VIDEO], aside from the show's newest cast member [VIDEO], Denise Richards, Vanderpump hosted an event benefitting the LGBTQ community at her restaurant, PUMP Lounge. However, while her co-stars often support her many events throughout Los Angeles, it does not appear that any of them attended her bash this week.

On October 11, The Daily Dish shared video and photos from the event, none of which included any of Lisa Vanderpump's co-stars. Instead, Vanderpump was seen mingling her husband, Ken Todd, Lance Bass, and many others.

Lisa Vanderpump was allegedly caught in a lie

According to Us Weekly magazine's report, a source claimed last week that there have been numerous attempts from Vanderpump's co-stars to get in touch with her. However, none of their calls have been successful. Meanwhile, another source said that after the women caught Vanderpump in a supposed lie, they have chosen not to talk to her at all.

“The women feel like [Lisa Vanderpump] doesn’t want to face them and confront the situation," the insider said. "She has kept her distance and now that’s creating more problems with the cast.”

Another source claimed Vanderpump's issues with her co-stars were further fueled after her longtime friend Kyle Richards "got into it" with her husband, Ken Todd.

As the insider explained, Richards was reportedly told she was never allowed to return to Vanderpump and Todd's home after their dispute.

“They were both screaming at each other. It was really bad and ugly,” the first source said.

Lisa Vanderpump 'has beef' with Teddi Mellencamp and Dorit Kemsley

“There was a situation with [Dorit Kemsley] and a puppy, but what hasn’t been talked about is that the puppy was biting Dorit’s kids,” the Us Weekly insider said. According to the report, Kemsley chose to give the puppy, who she adopted from Vanderpump's rescue center, to a friend, who ultimately took the dog to an animal shelter in Los Angeles.

"The Real Housewives of Beverly Hills" cast is expected to return to Bravo TV sometime later this year for season nine.