Olivia Williams (X-Men: The Last Stand) has been cast to co-star on Fox's Dollhouse.

According to The Hollywood Reporter, Joss Whedon's new sci-fi series, Dollhouse, revolves around a group of young men and women, aka Dolls, who are imprinted with different personalities for different assignments. They have no memories of their previous lives, until Echo (Eliza Dushku) begins to try to find out who she was.

Williams will play the ruthless and protective Adelle DeWitt who runs the Dollhouse.