Katherine Heigl will star in and produce the feature film adaptation of 'Escape', the bestselling memoir of cult follower Carolyn Jessop.
Variety reports that Jessop's testimony helped convict polygamist sect leader Warren Jeffs.
Jessop was born into a Fundamentalist Church and at 18 she married a man 32 years her senior.
Heigl's company, Abishag, which she runs with her mother Nancy, will co-produce the film.
'The Grey's Anatomy' star is currently shooting the Robert Luketic-directed comedy 'The Ugly Truth'.
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