The series, which is based on the highly popular George R.R. Martin series of novels, has been greenlit and will begin shooting in Belfast in June. Episodes will begin airing next spring. Thrfeed.com describes the series as "a sprawling tale set in the mythical land of Westeros [that] tells the story of the noble Stark family who become caught up in high court intrigue when patriarch Eddard (played by Sean Bean) becomes the king's new right-hand man."

Ehle will play Catelyn Stark, Eddard's wife and the matriarch of the family.

Currently appearing at Second Stage Theatre in Mr. and Mrs. Fitch, Ehle received her Tony Awards for The Coast of Utopia and The Real Thing. Additional stage credits include Design for Living and Macbeth. Television and film credits include "Pride and Prejudice," "Wilde" and "Possession."