We're a little behind here but here is some casting news.
Finn Jones will play the Knight of Flowers, Ser Loras Tyrell
Roy Dotrice, the narrator of the audiobook has been cast to play Grand Maester Pycelle
Finally Kristian Narin has been tapped to play Hodor. He is huge, 6'10 to be exact, so he should make a great Hodor.