As filming for the new season begins its early stages, WinterIsComing.net has reports on who will be joining the beloved cast of the hit HBO show "Game of Thrones" for season 4.

British actress Elizabeth Webster has been cast as Walda Frey, granddaughter of Lord Walder Frey and the young new wife of Roose Bolton, who at the end of season 3 was named Ward of the North. Walda Frey's marriage was mentioned during the shocking (for non-book readers, that is) "The Rains of Castamere" episode, and her character is set to first appear on the second episode of the fourth season.

Joining Webster this season will be "Doctors" actress Lu Corfield, who will be playing a Mole's Town madame at a local brothel. If you'll recall, Samwell and Jon Snow briefly discussed Mole's Town in the show's first season.

Sources tell WinterIsComing.net that British actor Noah Taylor is also returning to play Locke, whom we last saw in the episode "The Bear and the Maiden Fair," a lesser lord sworn to House Bolton who was sent in pursuit of Jaime Lannister after Catelyn Stark freed him and, if you'll recall, was the one responsible for chopping off his hand in one of the season's most grisly endings.

In case you don't want to be spoiled, don't read ahead!

Locke will taking the black at The Wall with the Night's Watch, perhaps as punishment for mutilating Lord Tywin Lannister's eldest son. Fans are excited to see Walda Frey and intrigued by the development with Locke. Will he and Jon Snow interact somehow? We'll have to wait until next spring when season 4 airs to find out!

Click here to see additional photos of Natalie Dormer, Diana Rigg and Gwendoline Christie filming in Croatia recently.

Elizabeth Webster & Lu Corfield. Actor headshots courtesy of WinterIsComing.net and IMDb.com.