Katherine Heigl's Ready to 'Escape'

Katherine Heigl is attached to produce and star in "Escape," based on the memoir by Carolyn Jessop, who fled a polygamist sect and helped expose the group.

According to Variety, Relevant Entertainment and Como Court Prods. acquired the book, while Michael Menchel and Cat Williams will produce along with Heigl and her Abishag shingle partner Nancy Heigl.

Born into a family of long-standing in the polygamist sect, Jessop was married at 18 to a 50-year-old man with three wives. In 2003, at the age of 35, Jessop fled the Fundamentalist Church of Latter Day Saints and sued for custody of her children. "Escape" was published in 2007, before Jessop offered key testimony in the trial of sect leader Warren Jeffs.

An Emmy-winning co-star on "Grey's Anatomy," Heigl had blockbuster success with last summer's "Knocked Up" and a solid winter hit with "27 Dresses." She's currently appearing in the comedy "The Ugly Truth," while developing two or three additional projects for Abishag.