Olivia Williams, best known for Rushmore and for Joss Whedon's "Dollhouse", has signed on to play a role in the upcoming The Seventh Son , Deadline reports. Already set to star Jeff Bridges, Ben Barnes, Julianne Moore, Alicia Vikander, Antje Traue and Kit Harington, The Seventh Son will be directed by Sergei Bodrov with a script from Matt Greenberg and Chuck Leavitt. The film is an adaptation of Joseph Delaney's children's book, "The ...