Kim Richards Checks Into Rehab

Credit: Jason Merritt/Getty Images

More real-life drama for the Real Housewives of Beverly Hills.

Kim Richards has checked into an undisclosed rehab treatment center, two insiders confirm to Us Weekly. (Entertainment Tonight was first to break the story on Monday.)

Former Disney child star Richards, 47, unwittingly exposed her problem with alcohol in the shocking first season finale of the Bravo hit -- in which she appeared intoxicated during a brutal fight with younger sister Kyle Richards.

Sister Kyle, 42, called her an "alcoholic" during the ugly brawl, and Kim briefly entered rehab at that time (mid-2010) for treatment, although she declined to discuss her addiction problems on camera or with the press.

Kim's behavior on the second season of the show (currently running) remained erratic. At one infamous game night hosted by new castmate Dana Wilkey, foe Brandi Glanville accused Kim -- who made frequent bathroom breaks and slurred her speech -- of being high on crystal meth.

The real culprit, theorized pal Dr. Paul Nassif, was a bad combination of prescription medications.