Tara Reid
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"She's doing well. The whole family is very positive about this being the new beginning for her," says the source, who is close to the family.
Reid decided to check herself in to Promises Treatment Center, and though she's been in treatment less than a month, her family and friends are optimistic about her future.
"They are taking steps to do everything they can to help Tara keep on the right track," adds the source, who says Reid is expected to check out of the center shortly.
When she entered rehab her rep would not reveal what Reid was being treated for.
In an interview in October, Reid told PEOPLE she was a "social drinker" who enjoyed an occasional glass of wine with friends, but said that her partying days were over.
