Kim Basinger is set to star in the
The actress will play the role of Christian Grey's former lover, Elena Lincoln, also known as Mrs Robinson, the woman who taught him "everything", reports Variety.com.
The role of who would star as Mrs Robinson had been at the centre of much speculation, with Sharon Stone and Catherine Zeta Jones named as high contenders.
Basinger will work alongside Dakota Johnson and Jamie Dornan, who will reprise their roles of Anastasia Steele and Christian Grey in Fifty Shades Darker.
Luke Grimes, Eloise Mumford and Max Martini are also returning to the cast, with James Foley set to direct the film.
Fifty Shade Darker and the final flick, Fifty Shades Freed, will be shot back-to-back with the production of the second film due to start later this year.