Some information about characters who's appearance in series 3 is confirmed:
- Princess Shireen, the daughter of King Stannis.
- Meera Reed, the daughter of Howland Reed, the lord of Greywater Watch of the Neck. Lord Howland is a loyal ally of Ned Stark and one of his best friends.
- Jojen "Little Grandfather" Reed, Meera's little brother.
- Brynden "The Blackfish" Tully, younger brother of Lord Hoster Tully. Lord Hoster is Lady Catelyn's father.
- Edmure Tully, son of Hoster Tully, younger brother of Lady Catelyn.
- Mance Rayder, the King-Beyond-the-Wall
- Olenna "Queen of Thorns" Tyrell
- Beric Dondarrion, leader of the Brotherhood Without Banners. Ned Stark sent him to arrest The Mountain in A Game of Thrones.
- Thoros of Myr, a red priest and member of the Brotherhood Without Banners. Was the fist to go over the walls of Pyke during Balon Greyjoy's first rebellion. Fights with a burning sword.
- Tormund Giantsbane, a chieftain amongst the free men and part of Mance Rayder's "court".
- Vargo "The Goat" Hoat, leader of the Brave Companions sellsword company (also known as Bloody Mummers behind their backs). Should not ride a horse in the series.
Important characters still missing are most notably Lem, Tom O'Sevens, Zollo, Qyburn and pretty much everyone from Astapor.
Otherwise I'm quite happy about the casting at the moment.