From HBO:
Iron Throne teaser trailer, January 16, running time 1:00
Invitation to Westeros featurette, February 19, running time 3:30
Iron Throne extended trailer, February 27, running time 1:40
Plus, from HBO and Access Hollywood, you can see Maisie Williams (Arya Stark) talk about swordfighting as a little girl (and a lefty!), as well as Sean Bean's (Ned Stark), Peter Dinklage's (Tyrion Lannister), Emilia Clarke's (Daenerys Targaryen), and producers Dan Weiss and David Benioff's musings on the project so far. Running times: 1:33, 4:30, 4:09, 3:56, and 5:02, respectively. *Minor* spoilers.
Iron Throne teaser trailer, January 16, running time 1:00
Invitation to Westeros featurette, February 19, running time 3:30
Iron Throne extended trailer, February 27, running time 1:40
Plus, from HBO and Access Hollywood, you can see Maisie Williams (Arya Stark) talk about swordfighting as a little girl (and a lefty!), as well as Sean Bean's (Ned Stark), Peter Dinklage's (Tyrion Lannister), Emilia Clarke's (Daenerys Targaryen), and producers Dan Weiss and David Benioff's musings on the project so far. Running times: 1:33, 4:30, 4:09, 3:56, and 5:02, respectively. *Minor* spoilers.