First I have the honour to anounce for House Lannister: Here comes Ser Jaimie Lannister, knight of the kingsguard known as the Kingslayer!
Played by Nikolaj Coster-Waldau
Here him roar!
Second for House Greyjoy, we have the young kraken Theon Greyjoy, going to be played by Alfie Allen
For Houe Stark we have the following young wolves:
Maisie Williams is Arya Stark:
and Sophie Turner is Sansa Stark:
Both of them are very young, hense there are no better photos. I really hope they are not going to focus away from them, because they are children, Arya is one of my absolute favorites.
And finally Robb Stark, heir of Winterfell is going to be played by Richard Madden, who looks exactly like I always imagined Robb to look
For House Targaryen we have the Queen across the water, Khaleesi of the Dothraki, Daenerys Stormborn who's going to be played by Tamzin Merchant (who was on Tudors recently):
Bit hard to imagine her as the last dragon, but I'm sure she'll do perfectly.
As her knight Ser Jorah Mormont, exile knight, onxe Lord of Bear Island we have Iain Glen:
It pretty much looks marvelous to me *rubs hands*