01/09/2012 at 04:00 PM EST
Kim Richards is out of rehab, a source close to the Real Housewives of Beverly Hills
star tells PEOPLE.
Richards, 47, started treatment
in December for alcohol abuse and other "serious issues." It was not the first time she had been admitted to rehab.
Just last week, Richards' sister and Real Housewives
costar, Kyle, told people Kim was doing "really well" with her treatment.
During the most recent season of Real Housewives
, Richards exhibited odd behavior
that she said was caused by a combination of prescription medications.
The cast taped a reunion show last week, according to Bravo executive (and on-air personality) Andy Cohen. The network did not immediately return calls as to whether or not Kim participated in the reunion taping.
"It was high drama, lots of emotion, and some fun and laughs too," Cohen wrote on his blog
. "All the women deserve a pat on the back. High highs and low lows."