I was fascinated to read recently that Rosamund Pike modeled her performance as the mysterious Amy in Gone Girl on the “unknowable” Carolyn Bessette Kennedy, the wife of JFK Jr. “You never heard her speak,” Pike explained. “You just see those pictures of her hiding her face.” In the end, though, aren’t we all “unknowable”? Carolyn’s big mistake was trying to hang on to her privacy in a world where celebrities no longer have the right to a private life.