Now that Howl duo Rob Epstein and Jeffrey Friedman are hard at work shooting Linda Lovelace biopic Lovelace , they’re adding a few faces to the cast, with Demi Moore , Adam Brody and Eric Roberts all signing on. Lovelace tells the tale of Linda Boreman ( Amanda Seyfried ) who shot to infamy as the world’s first erotic superstar when she was plucked from obscurity by Chuck Traynor ( Peter Sarsgaard ) to star in Deep Throat . But her life was filled with addiction, abuse and depression and she eventually campaigned against pornography. Moore is aboard to play Gloria Steinem , the activist who founded Ms Magazine and penned a key article about Lovelace’s unhappy life. Brody is on as Throat co-star Harry Reems , while Roberts will be Nat Laurendi , who carried out a lie detector test on Linda at the request of the publisher when she wrote her memoir Ordeal. The three newcomers join a cast that already includes Seyfried, Sarsgaard, Sharon Stone, Wes Bentley, Hank Azaria, Bob