Margaery Tyrell, from S2 - S6. Such a contagious smile.
Why are some fans thinking Sansa will die just because they saw her body double in one of the pictures? That doesn't mean anything at all. ALL of the actors have their own body doubles and they are used frequently, so who cares? Maybe Sophie was unavailable for a particular scene that day. And IF she really was supposed to be dead, then why have a double at all? The character wouldn't matter anymore.