Diana Rigg joins 'Game of Thrones'
Diana Rigg is joining "Game of Thrones." (Let that sink in. OK. Sunk?) She'll be playing the Queen of Thorns - though her real name, as Throniacs know, is "Olenna Tyrell."
Rigg needs no introduction, but just in case. She's one of the greats.
Check out this cast announcement that turned up - of all places - at Comic-con:
