Diana Rigg has officially joined Game of Thrones. The star of 1960 TV spy series The Avengers will play Olenna Redwyne the Queen of the Thorns it was confirmed today at Comic-Con. Rigg is one of a number of actors to join the HBO fantasy drama this upcoming season. Richard Dormer, Pirates of the Caribbean regular Mackenzie Cook and several others have also joined the show it was revealed in a video shown to Hall H this afternoon. The new cast members were made known after a season two highlights video was played. George R.R. Martin, the author of the books on which the series is based, moderated the panel that included series regulars Alfie Allen, Emilia Clarke, Michelle Fairley, former Downton Abbey regular Rose Leslie, Kit Harington and Richard Madden. Executive Producer Carolyn Strauss also appeared. As if to illustrate the turn over on the show, where a lot of characters get killed off, Clarke, who plays Daenerys Targaryen, is the only member of the Game of Thrones cast to return to Comic-Con from last year. The absence of a number of the show’s other main cast was due to the series being deep into filming the third season, according to Martin. A source tells Deadline that Game of Thrones has filmed nearly two episodes of the new season.

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