Less than a month after checking herself into the Promises Treatment Center, Tara Reid has left rehab, according to a source.

“She checked out on Saturday,” says the source. “She’s doing well. The whole family is very positive about this being the new beginning for her.”

Despite Reid being in treatment since only last 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.

When the 33-year-old actress entered rehab her rep would not reveal what she 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.

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