Troubled actress Demi Moore has reportedly entered an addiction-treatment center, subsequently missing her daughter Tallulah's 18th birthday party.

Moore, 49, who was taken to a hospital Jan. 23 after a 911 call from her home, has checked into Utah's tony Cirque Lodge, according to E! News, which said Moore is being treated for both an eating disorder and addiction issues. She went to Cirque Lodge from her home in the Benedict Canyon section of Los Angeles, where she had returned for some days after her hospitalization, E! said, adding that the actress was there all last week. There was speculation that both her ex-husband, Bruce Willis, and her estranged husband, Ashton Kutcher, had visited her at home.

The report did not specify which of the center's two facilities -- the Lodge or the Studio, in the towns of Sundance and Orem, 10 miles apart -- Moore had checked into.

Other celebrities who have recovered at Cirque include David Hasselhoff, Lindsay Lohan and Mary-Kate Olsen, according to the CBS/Paramount entertainment-news series "The Insider." Also, Melanie Griffith and "American Pie" actor Chris Klein spent time there, according to People magazine.

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Moore's stay, if true, coincided with Tallulah's birthday party Friday at dad Willis' Beverly Hills mansion, People reported. The magazine said Rumer, the eldest of the couple's three daughters, attended, but it did not mention Scout, the youngest.

Additionally, the tabloid-debunking site said that singer Miley Cyrus, Moore's co-star in the as-yet-unreleased "LOL," did not post a supportive message to Moore on her Facebook page, despite a claim Saturday by A representative for Cyrus told GossipCop Sunday, "There's no truth" to that report.