Lindsay Lohan is following up her wild year by joining a cult in a new film role, that is.

E! News reports that Lindsay Lohan has signed on to star as Nancy Pitman, once a faithful associate of Charles Manson’s not-so-merry band, in the movie Manson Girls.

The film’s producer, Brad Wyman of Junction Films, confirmed the casting coup.

“Yes, I am doing it with Lindsay,” he told E! News.

A source accustomed with the deal says that despite the fact that Lohan has had some brushes with the law, of late, and just completed rehab, “the production company is insuring her for the film.”

As E! News first reported, before shooting Manson Girls Lohan will shoot the off-the-wall comedy Ye Olde Times with Jack Black and David Arquette this spring. That film is due out in 2009.

Pitman grew up in wealthy household in Malibu, and at 16 she was introduced to Manson by a buddy, according to published records. She fell under his spell, moving in with him and becoming one of his most enthusiastic followers. She was home with Manson on the night he dispatched members of his “Family” to the former home of ex-business associate Terry Melcher, where they ended up brutally slaying actress Sharon Tate and four others.

Pitman, aka Brenda McCann, later became involved with the Aryan Brotherhood and served 18 months in jail after being accused of being an accessory after the fact to murder. She subsequently married one of her coconspirators, divorced and moved to Oregon with her two children.

Attempts to contact Pitman were not immediately fruitful.

Lohan next appears opposite Jared Leto in what should be another heart-tugging true-life tale: Chapter 27, a film examining the life of John Lennon killer Mark David Chapman and opening in limited release this weekend.