HBO's Game of Thrones revealed its Season 3 premiere date and at least 13 additional cast members at Comic-Con this afternoon. The acclaimed, epic drama will return March 31, 2013.

A long time to wait, but it should be worth it, especially since network announced that Diana Rigg is joining the Game of Thrones cast as Lady Oleanna Tyrell, a.k.a. the Queen of Thorns.

Rigg will be joined by these 13 additional new actors next spring:

Clive Russell (Bryndon “The Blackfish” Tully) Kerry Ingram (Shireen Baratheon) Tara Fitzgerald (Selyse Baratheon) Paul Kaye (Thoros of Myr) Thomas Brodie-Sangster (Jojen Reed) Ellie Kendirck (Meera Reed) Richard Dormer (Beric Dondarrion) Nathalie Emannuel (Missandei) Tobias Menzies (Edmure Tully) Anton Lesser (Qyburn) Philip McGinley (Anguy) Kristofer Hivju (Tormund Giantsbane) Mackenzie Crook (Orell)

Filming for Game of Thrones Season 3 will take place in Belfast, Northern Ireland, Croatia and Iceland later this year. Here's a video introducing some of the new cast members as well:

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.