Christian Grey 's has been cast as Rita Ora sister in Twitter The The Hollywood Reporter pop star is a relative newcomer to acting . The best-selling book-turned-potential film franchise also stars Max Martini ( bodyguard Jason Taylor ) and newcomer Eloise Mumford ( roommate Kate Kavanaugh ) . Ora confirmed the news on `` Fifty Shades '' .
Christian Grey 's has been cast as Rita Ora sister in Twitter The The Hollywood Reporter pop star is a relative newcomer to acting . Ora confirmed the news on `` Fifty Shades '' .