The erotic novel by EL James had attracted a bidding war from several film studios for the book's rights.
Universal has picked up the rights for the series of novels, while Focus will market the movie.
Warner Bros, Paramount, Fox Searchlight, Sony Pictures, Paramount, New Regency, Mandate and Lionsgate/Summit Entertainment had all been invited to place bids for the film rights.
Fifty Shades of Grey tells the story of Anastasia Steele, a young college student who becomes involved with a successful businessman with a penchant for BDSM, and has been dubbed 'mommy porn' in the US.
The trilogy of books shot to the top of the New York Times and Amazon best-seller lists after it was released in the US.
The novel was originally inspired by Stephenie Meyer's Twilight series, with James posting the story on an online fan fiction website.