One of the upcoming book-to-film adaptations that people are looking forward to is The Last Mrs. Parrish. Now, we've just learned that a beloved Game of Thrones actor has joined the film's cast in a leading role. The Last Mrs. Parish is based on the hit thriller novel of the same name by Lynne and Valerie Constantine. When it comes to producers, Lopez, Liza Chasin, Molly Sims, and Elaine Goldsmith-Thomas are all on board for The Last Mrs. Parish. The Last Mrs. Parish follows Amber Patterson, a cunning con artist who sets her sights on a wealthy couple.