Marcia Gay Harden has been cast in the movie adaptation of Fifty Shades of Grey -- find out who she's playing Credit: David Livingston/Getty Images

Fifty Shades of Grey has added yet another Grey in the form of Marcia Gay Harden. The Academy Award-winning actress, 54, has just joined the cast of the upcoming film adaptation of E.L. James' erotic novel, Deadline reported Tuesday, Dec. 3.

Harden, currently starring on ABC's Trophy Wife, will play Dr. Grace Trevelyan Grey, the adoptive mother of Christian Grey (Jamie Dornan), Elliot Grey (Luke Grimes), and Mia Grey (Rita Ora). Her casting leaves just one Grey family member unaccounted for -- Christian's father, Carrick Grey.

Other stars in the much-anticipated movie include Dakota Johnson as Anastasia Steele, Eloise Mumford as Anastasia's BFF Kate, Jennifer Ehle as Anastasia's mom Carla, and Victor Rasuk as Anastasia's friend Jose. Dornan replaced Sons of Anarchy star Charlie Hunnam earlier this year, after the latter dropped out at the last minute.

Directed by Sam Taylor-Johnson, Fifty Shades of Grey began filming in Vancouver, Canada, on Sunday, Dec. 1. It is expected to hit theaters on Feb. 13, 2015.