The 29-year-old wants to do something fun and different and believes the movie - which details S&M-crazed billionaire Christian Grey's relationship with the young student - will live up to that, reported Sun Online.
"There are times when you just want to do something fun and different, because you're going to have a good time doing it," she said.
Several stars have been linked to the part of Anastasia including "Harry Potter" actress Emma Watson and brunette beauty Keira Knightley.
