User blog comment:KarinS/Oona Chaplin will play...?/@comment-26308-20110812153855

According to one report, they're looking for someone with a Scottish accent for Ygritte, which I presume rules out Oona from that role. Other possibilities would be Princess Elia Martell of Dorne in flashback (and there is a hugely significant flashback scene in Book 2 involving Elia and Prince Rhaegar which is very important to the overall storyline which I think would be hard to skip), Alayaya (unlikely as I think Ros will be performing her role) or Jeyne Westerling.