Harry Styles is in final negotiations to star in a feature adaptation of Bethan Roberts' acclaimed LGBTQ-themed novel My Policeman from Amazon Studios and producer Greg Berlanti, Collider has learned. Lily James is in negotiations to play the female lead in the currently untitled film, which Tony Award winner Michael Grandage (Genius) is set to direct from a script by Oscar-nominated writer Ron Nyswaner (Philadelphia), who adapted Roberts' 2012 book. Berlanti will produce alongside his husband Robbie Rogers as well as Sarah Schechter via their newly-rechristened Berlanti/Schechter Films. Cora Palfrey and Philip Herd will also produce …