Buzz·Posted on 3 Dec 2013Rita Ora Will Star In "50 Shades Of Grey"The sassy Roc Nation singer has bagged her biggest acting role to date.by Dan MartinBuzzFeed StaffLinkFacebookPinterestTwitterMail Pop singer Rita Ora has been cast in the 50 Shades of Grey movie. She shared the news of her biggest acting role yet on Twitter yesterday. Rita Ora @RitaOra It's official! I've been cast in @FiftyShades of Grey as Christian's sister Mia. #FiftyShades 10:19 PM - 02 Dec 2013 Reply Retweet Favorite Rita Ora@RitaOraIt's official! I've been cast in @FiftyShades of Grey as Christian's sister Mia. #FiftyShades/ Via Ora will star alongside Dakota Johnson and Jamie Dornan in the movie, now set for a 2015 release.