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. "There are a lot of surprises. One or two quite bold scenes if I can put it that way and they're great fun to do," says Rigg. Watch every episode of "Game of Thrones" before the Season 3 Premiere on 3/31/13.
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