'Game of Thrones': Meet the New Faces of Season 3

Even though the third season of HBO's "Game of Thrones" doesn't premiere until March 31, 2013, a large number of new faces have already been added to the cast. Click through this slideshow to find out which characters the new cast members will be playing.

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Diana Rigg as Lady Olenna Tyrell

Also known as "The Queen of Thorns," Lady Olenna is the grandmother of Margaery and Loras Tyrell and is, in many ways, the true leader of their powerful family.
Diana Rigg as Lady Olenna Tyrell

Also known as "The Queen of Thorns," Lady Olenna is the grandmother of Margaery and Loras Tyrell and is, in many ways, the true leader of their powerful family.