The Mean Girls star has been in and out of jail and rehab in recent years, but was said to have put her dark days behind her by staging a career comeback in 2012 with roles in the new Scary Movie installment and an Elizabeth Taylor TV biopic, Liz & Dick.
However, Lohan has been in the news for all the wrong reasons recently after she was arrested in New York last month (Sep12) for allegedly clipping a pedestrian with her car, and she also accused a man of assaulting her in a dramatic scene at a hotel in the city.
She hit headlines again this week (beg08Oct12) after cops were called to her family home in Long Island to investigate allegations a argument with her mother, Dina, had turned nasty.
The dispute broke out after the pair enjoyed a night at a club in Manhattan, sparking speculation about whether Lohan had turned back to booze, but the actress now insists she is clean.
During an interview with TMZ.com, Lohan was asked whether she is sober, and she replied, ""Yes I am. And I'm happy and I'm healthy.""
She also insisted the argument with her mother was blown completely out of proportion, adding: ""I'm really regretful about the argument that I had with my mother... and I said very hurtful things in the heat of the moment.
""I am very close with my mom and siblings. We're tight-knit. We support each other and we love each other.""