Marcia Gay Harden has revealed the cast of the Fifty Shades Of Grey movie still haven’t seen the finished product themselves.

Sam Taylor-Johnson’s big screen adaptation of EL James best-selling erotic novel, starring Jamie Dornan and Dakota Johnson as kinky lovers Christian Grey and Anastasia Steele, is due to hit cinemas in the UK on Friday February 13.

Ever since the project was announced, fans of the book have been on tenterhooks waiting to see what the story will be like on the big screen.

But Marcia, who plays Christian’s mother Dr Grace Trevelyan Grey, told Access Hollywood: “The director is letting the cast see the movie but not right now.”

She joked: “I’m going to see it right before the fans do… but this is a movie that is protected.

“It’s like they’ve got a chastity belt around the movie itself.”

The film also stars Rita Ora as billionaire Christian’s sister Mia.