In the teaser we hear for the first time the new voice of the Three Eyed Raven, played by Max von Sydow.
We also hear the voice of Bran Stark, who is back next year after taking a season off.Game of Thrones Season 6 premieres in April, 2016.
Kit Harington takes questions from the audience (Emilia Clarke, John Bradley, Rose Leslie, Pete Davidson) while trying to avoid Game of Thrones spoilers.