Amanda - who is under the conservatorship of her mother, Lynne, until 2020 - checked into the clinic after relapsing in her battle against drug addiction and other mental health issues.
Since leaving the facility, the 33-year-old star has been working hard on her planned fashion line, which she decided to launch after graduating from the Fashion Institute of Design & Merchandising.
Tamar Arminak, a lawyer for the actress and her family, recently reassured fans the 'She's The Man' star was doing "remarkably well" after choosing for herself to re-enter treatment.
Tamar said: "I can tell you she's doing remarkably well, under the circumstances.
"This time around, she realised herself, after the Paper Magazine interview spread, that she really wasn't feeling like herself, all of the sudden.
"She wanted to address it right away before going back into showbusiness and exploring showbusiness again.
"It was her decision and her choice to address the situation, seek treatment, which, I think, is an incredibly mature way to handle this type of thing.
"I think we're proud of her, her parents, I can certainly say are proud of her. Her family, they're on amazing terms, great terms, and looking forward to her success."
-Bang! Showbiz