The actress checked herself into the Promises rehab facility in Malibu, California, on Monday--after she was arrested for driving under the influence over the weekend.
It is the second stint in rehab for Lohan, who completed a 30-day program at Wonderland in Los Angeles earlier this year--but pal Nate Newell says she is coping well.
Newell tells People.com, "She's happy where she is and is just taking time to herself to learn and be okay. I've been in touch with her and she likes it.
"Wonderland is an outpatient service so she was back and forth from the (I Know Who Killed Me) set, but this time she'll totally be there (at inpatient center Promises). She just needs to be away from everyone and not get attacked by the paparazzi.
"She's doing really, really well. She probably should be there and it will be the best for her. I think now she's ready for it."
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