The Vampire Diaries star has been tipped for the role by Bret Easton Ellis, who has expressed an interest in writing a screenplay based on EL James's erotic bestseller.
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"Id so love to be ChristianGrey w/you&Angelina Jolie," Somerhalder said to Ellis on Twitter.
"Ive only waited 10 years to do a movie w/u.Im grown up now-no worries."
Jolie has been linked to a possible job directing the film, though her representatives have denied having discussions about the project.
Ellis's favoured director for the movie is David Cronenberg, and he has also said that Ryan Gosling would be "perfect" in the title role.
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