The world will be waving a sad goodbye to Arya Stark as the final season of Game of Thrones airs next month, and for Williams, dyeing her hair pink was her own way of leaving Arya behind. The actress revealed in a new interview with Rolling Stone that the bold hair-colour change was a purposeful choice to claim her freedom — not just from the series she's spent the better part of the past decade filming, but from the industry as a whole.