Tallulah Willlis has reportedly left rehab. The youngest daughter of Demi Moore and Bruce Willis has allegedly finished a 6 week treatment program after battling drug and alcohol abuse.

The 20-year-old has also taken steps towards combating an ongoing struggle with dysmorphia.

According to Perezhilton.com, Tallulah checked into The Meadows, an Arizona rehab facility, in July. Her parents allegedly gave her an ultimatum, which convinced her to check herself in.

"Hai. But really it's bai bai," Tallulah posted on Twitter on July 23, shortly before entering the facility.

After 6 weeks of treatment, Tallulah was reportedly picked up from rehab by mother Demi Moore.

While the specifics of Tallulah supposed substance abuse issues are unknown, the young woman recently opened up about her struggles with dysmorphia, a condition in which the inflicted believes that his or her body is defective or worth fixing.

In an interview with the blog Stylelikeu's "What's Underneath" project, Tallulah revealed that she has suffered from the illness for some time.

Regarding body image, the celebrity daughter explained, "By the time I realised that that wasn't who I was anymore, it was like I was trapped in this body and I hated that I was sexy. So that was the first time I started starving myself and losing a bunch of weight and I got down to like 95lbs. I viewed super-skinny me as like smart, intelligent."

She added, "When I lost my curves and when my boobs shrivelled up into nothing and I had no shape. It put me in even more of a cage."

The 20-year-old shared a picture of the interview on her Instagram account, captioning it, "very grateful to have been apart of @stylikeu what's underneath project."