Rogue One stars Felicity Jones, Diego Luna, Ben Mendelsohn, Riz Ahmed, Donnie Yen, Jiang Wen, Forest Whitaker, Mads Mikkelsen, and Alan Tudyk. Genevieve O'Reilly reprises her role as Mon Mothma, the leader of the Rebel Alliance; O'Reilly portrayed the character for 2005's Star Wars: Episode III Revenge of the Sith, but her scenes were cut. The film also features the return of Darth Vader. The film, which began production in August 2015, is set between Revenge of the Sith and Star Wars: Episode IV A New Hope. It is set closer to the latter film and focuses on the formation of the Rebel Alliance and their efforts to steal the plans to the Death Star, an event that was referenced in the opening crawl of A New Hope. Jyn Erso, played by Jones, and a group of other characters band together to steal the plans from the Galactic Empire. Edwards has described the film as a grounded, war-based movie, one in which normal people have to come together to fight the Empire as opposed to relying on the Jedi or the Force.