Lindsay Lohan "Is a New Girl," Taking Recovery Seriously With "Strict" Sober Coach

Close Lohan source tells E! News that the actress really enjoyed her time in treatment and she wants people to know that her partying days are over

Lindsay Lohan says that she is committed to staying on the road to recovery.

Fresh from completing 90 days of court-ordered rehab, Lohan is telling those around her that she is taking what she learned in treatment to heart and is willing to do what it takes to turn her life around.

"She is taking this really serious," a close Lindsay source exclusively tells E! News. "She wants people to know the days of her clubbing and partying are over and she is a new girl."

We can confirm that she has hired a sober coach, whom she worked closely with at Cliffside Malibu, to be around her at all times as she transitions back to so-called normal life.

The coach is letting her stay at his house in Los Angeles for the next couple of nights and he will be accompanying her on an upcoming trip to Europe and then will live with her for a time back in New York.

"The coach is a really fun, great person, but is very strict about keeping Lindsay together and not falling back," our insider says.

And we are told that it was Lohan who was adamant about hiring the coach and keeping him close at hand.

"I believe she is going to keep things low-key from now on," the source adds, saying we may not see much of Lindsay for a while. "This is a new chapter in her life."

Before the 27-year-old star heads under the radar, however, we'll see her guest-host next Monday's episode of Chelsea Lately and she's going to be sitting down with Oprah Winfrey as part of an an eight-part docu-series that will air on OWN.

The Lohan source tells us that she really enjoyed her time at Cliffside and became friends with everyone in the facility and just "loves" her therapist—which is fortunate, because she's required to have three 50-minute counseling sessions a week (in person or via Skype, etc.) for 18 months.

According to the insider, while in rehab Lindsay also had family therapy sessions with parents Michael and Dina Lohan, with Michael visiting in person and Dina piping in via speaker phone. The sessions were really good for Lindsay, the source says.