Previous patients at Cirque Lodge include Lindsay Lohan, Mary-Kate Olsen and Eva Mendes.
According to E! News, the "Margin Call" actress is currently "on vacation" in an undisclosed location. "She's in no rush to get back to L.A.," a source tells the site. "She's on total lockdown and only talking to a small group of people."
Moore's decision to seek treatment came on the heels of her emergency hospitalization after smoking an "incense-like substance" on Jan. 23. "Everyone thought she was going to die," a source told Us in February. "It was terrifying."
Following her split with Ashton Kutcher in November, the actress' life was "in complete crisis," another insider told Us. "She is turning 50 in November and has no idea who she is or what her life should be."
Friends of Moore were relieved the actress decided to finally face her issues. "She knows she's in a bad place and needs help," a source explained of the actress, who first went to rehab in 1985. "She needed something serious to get her back on track."