Fifty Shades of Grey author admits she has actors in mind for film The British author appeared on the US programme, Katie, hosted by Katie Couric, on Monday to discuss her trilogy of hit erotic novels, which follows the turbulent sexual relationship between collage graduate Anastasia Steele and business magnate, Christian Grey. The screen rights to Fifty Shades Of Grey were acquired by Universal Pictures and Focus Features in March but the film's casting still remains a mystery. "I have three people who could play Christian and I think four who could play Anna, and I'm not going to tell you any of them," she told the studio audience. There has been a great deal of discussion surrounding the film adaptation, with one unofficial YouTube trailer containing a popular casting choice receiving over 800,000 views online. Speculations surrounding the cast have included the likes of Justin Bieber and Emma Watson as well as The Notebook's Ryan Gosling. One audience member asked the author if she was considering writing another book in the series. She replied: "maybe," but added that it would not happen soon.