Rihanna is extending the scope of her acting skills. The “BBHMM” singer has been cast in the upcoming sci-fi film, “Valerian and the City of a Thousand Planets,” alongside model Cara Delevingne, Dane DeHaan (The Amazing Spider-Man 2), and Clive Owen (Closer). Although the role she plays is unclear, according to Luc Besson, the film’s director, we can expect to see RiRi in a “big part.” Find out more after the jump.