'RHOBH' Stars Lisa Vanderpump and Kyle Richards Friendship Timeline: Season 9 Feud is One of Many For the Co-Stars

Kyle Richards and Lisa Vanderpump's friendship is over. The reality stars haven't spoken since their huge fight on Real Housewives of Beverly Hills Season 9, despite Richards' attempts.

Richards appeared on E!'s Just The Sip on Wednesday and revealed she's reached out to Vanderpump a number of times, but hasn't had any luck getting through to the restauranteur. She explained she even contacted Vanderpump to wish her happy birthday the day after their explosive argument was filmed, but Vanderpump never replied.

Richards said she also texted Vanderpump about fellow castmate Camille Grammer's bridal shower in September, "and again, crickets."

"Both of them were delivered because it said delivered. Now, I have been blocked and it doesn't say delivered, because I reached out to her again recently to congratulate her on the opening of Vanderpump Lounge in Las Vegas," Richards said. "That one didn't say delivered so now I know that I have since been blocked. Before she was just saying I was blocked but I actually wasn't."

Vanderpump wrote in a recent blog post that she blocked Richards from texting her indefinitely, claiming that her longtime pal "threw our relationship down the toilet" when Richards confronted her regarding her alleged involvement in a leaked RadarOnline story about cast member Dorit Kemsley.

Some fans are hoping the women can hash out their differences on the RHOBH Season 9 reunion—that is if Vanderpump even shows up. She has yet to confirm her appearance at the reunion at this time.

If she does attend and clear the air with Richards, it certainly wouldn't mark the first time the pair have kissed and made up. Their current feud is one of many their friendship has endured over the last nine years.

Read on for a look back at all the times have killed then revived their friendship below.

2010

Vanderpump and Richards were two peas in a pod when the show premiered in October 2010. Viewers loved their incessant banter and NSFW humor, and it was very clear from the start they had a best friend bond.

2012

It was during the Season 2 reunion when Richards and Vanderpump's friendship faced its first bump in the road. The moment came when Richards suggested Vanderpump was "calculated" and said being in a friendship with her "is like playing chess with Bobby Fischer." Many of their castmates felt the same about Vanderpump at the time, including former RHOBH star Adrienne Maloof, who accused Vanderpump of selling stories about the cast to the press.

2013

The pair were back allies on Season 3, however, their friendship faced another rupture when Vanderpump began to grow closer to Brandi Glanville, the designated "mean girl" of the RHOBH cast who regularly caused strife among the cast, particularly with Richards.

2014

Vanderpump and Richards' friendship saw its first major blow on Season 4, and it was mostly caused by rumors Glanville spread. Glanville claimed Vanderpump planned to bring tabloid stories containing infidelity rumors about Richards' husband Mauricio Umansky on the cast trip to Puerto Rico. Vanderpump denied ever having any intentions to do so. Richards was still livid Vanderpump discussed Umansky's alleged affair on camera, especially after the couple had already denied claims of his unfaithfulness.

2015

Still reeling on the fallout from Season 4, Vanderpump started Season 5 isolating herself from the cast. However, that changed over the course of the show when she and Richards finally made up and promised not to engage in gossip about one another going forward.

2016

The friends faced another minor riff during Season 6 after castmates Lisa Rinna and Eileen Davidson dragged them into their controversy with Yolanda Hadid. The big drama of the season came when Rinna suggested Hadid was lying about her Lyme disease diagnosis and suggested she suffered from Munchausen syndrome instead. Although Richards wasn't a part of the gossip, Rinna and Davidson convinced her Vanderpump wanted her name to be brought into the mix. Richards said she was "annoyed" that she was pulled into the drama unnecessarily, but the friends managed to get over it pretty quickly.

2018

After playing nicely for all of Season 7, Vanderpump and Richard suffered another hit when Richards got the impression Vanderpump valued Dorit Kemsley's friendship more than hers. Meanwhile, Vanderpump seemed to think neither Richards nor Kemsley were paying her enough attention. By the end of it, their differences were set aside and all three women agreed to be attentive friends.

2019

A scandal referred to as PuppyGate rocked the cast at the beginning of the current season of RHOBH. It all started when Kemsley adopted a dog from Vanderpump's animal rescue charity and rumors emerged Kemsley gave the dog to a kill shelter. Although the speculation turned out to be untrue, Vanderpump was rumored to have come up with the plot. Things only got worse when tabloids began covering the situation. Kemsley believed Vanderpump was behind the press leak. When Richards confronted her, an argument ensued, leading Vanderpump to kick Richards out of her home.

'RHOBH' Stars Lisa Vanderpump and Kyle Richards Friendship Timeline: Season 9 Feud is One of Many For the Co-Stars | Culture