While it was our actress in the close-up scenes, the full body scenes were shot using a body double.

When you saw an actress bravely walk through a long, grueling scene wearing only her birthday suit, many of you were impressed.

Sorry to disappoint you, but it wasn’t her!

While it was our actress in the close-up scenes, the full body scenes were shot using a body double. Our actress actually does have an enviable physique, but she felt she was not at her physical best to do the scene at the time it was shot.

Our actress and the producers saw more than a dozen body doubles before choosing one.

Although they could have gone for an”improved” version (e.g. bigger boobs or a smaller waist) they chose someone whose body proportions closely resemble our actress’ natural body.

The head of our actress was added on via CGI in post-production.

Lena Headey in Games of Thrones
http://www.digitalspy.co.uk/ustv/s151/game-of-thrones/news/a653763/game-of-thrones-star-lena-headeys-walk-of-shame-nude-body-double-is-revealed-as-actress-rebecca-van-cleave.html#~pgd3C3HDzcmygX

Source: http://blindgossip.com