Judging by the youthfulness in her face that are without any major alterations that would give the tell-tell sign of surgery, that this has to be most logical answer.
What was also expected was Cersei Lannister's walk of shame after her detainment by the Sparrows, then made to atone for her sins by walking through the streets of the capital, King's Landing.
Not only are stars able to step away from the most perilous aspects of their roles with a stunt double, but actors can also opt to have body doubles for other scenes.
Whatever anyone wants to do is fine with me.