Lights, camera, tension! Prince Harry, 35, and Meghan Markle, 39, are shopping a top-secret project to Hollywood execs that’s sure to drive an even bigger wedge between the Windsors, a source tells Life & Style. Per reports, the couple, who were forced to give up their royal titles when they stepped back from royal duties, met with several networks, including NBCUniversal, to discuss a mysterious pitch that will grant them brand-new titles — as executive producers. “Everyone is intrigued about what goes on within palace walls, and they hold the key to a vault full of royal secrets,” dishes the source. “Studio heads are willing to pay millions, enough so they never have to work again! It would be hard for anyone to resist.” While nothing has been greenlit yet,…