‘50 Shades of Grey’ Movie Casting Update: Marcia Gay Harden To Play Christian Grey’s Mom, Dr. Grace Trevelyan, In ‘Fifty Shades’ Film [PHOTO]

Another famous face has signed on to join the “Fifty Shades of Grey” film adaptation.

Author E.L. James, creator of the best-selling "Fifty Shades" erotica trilogy series, confirmed on her official Twitter account late Tuesday that Academy Award-winning actress Marcia Gay Harden has officially signed on to star in the film. According to the Hollywood Reporter, Harden will portray Dr. Grace Trevelyan Grey, the adoptive mother of lead Christian Grey.

While Harden, 54, who is famous for her recent work on the comedy “Trophy Wife” and HBO's “The Newsroom,” has yet to publicly comment on the casting update, she did retweet a fan page’s congratulatory message via her official Twitter account on Wednesday. "@Beloving2 Congratulations and welcome to the #FiftyShades big family! :D” said Twitter user @WATP_MrBomer.

Dr. Grace Trevelyan Grey, a pediatrician, makes her first appearance in the “Fifty Shades” series after surprising Christian and his lover Anastasia at his swanky Seattle apartment following the lovers' first night together. According to the “Fifty Shades of Grey” Wiki Page, Dr. Grey is described as having “sandy-colored hair” and “hazel eyes.”

News of Harden’s casting comes one day after James, 50, announced that British-based “How We Do” singer Rita Ora was hired to play Christian Grey’s adopted sister, Mia Grey. Following the announcement, fans protested the casting decision on social media, with many complaining that Ora’s skin tone does not accurately fit the description of the character.

“She is supposed to be Caucasian, raven color hair and tall,” commented Instagram user @smccown1968 on Wednesday. “I think they missed the boat on [Mia Grey].” Another Instagram user, allisonlejeune, later added, “She is described as being an all American type. A white brunette. Rita Ora is pretty but she doesn’t fit the description.”

“Fifty Shades of Grey” officially started production in Canada on Sunday. The film’s stars, actors Dakota Johnson (Anastasia "Anna" Steele) and Jamie Dornan (Christian Grey) were spotted filming the first scene of the film at an undisclosed location in the GasTown District of Vancouver. According to speculation, the duo appeared to be shooting the fan-favorite “coffee date” scene from the first book.

“Fifty Shades of Grey” is currently scheduled for a February 2015 release.