'Housewives' Kim Richards enters rehab

Real Housewives of Beverly Hills cast member Kim Richards has entered a rehabilitation clinic.

The star's rehab stint was announced on Thursday night's season finale, which featured a fight between an inebriated Richards and her sister Kyle at castmate Taylor Armstrong's birthday party.

According to the show, Richards's family checked her into an unnamed centre after the incident, in which she threatened her sister by saying: "Watch your step."

Kyle later wrote about the fight on the show's official blog.

"My heart was broken and I suffered an incredible amount of anxiety and panic attacks. Next to losing my mother, this was the most difficult time of my life," she posted.