HBO has released a 15-minute preview of season four of Game of Thrones.

Warning: This article and video contains spoilers about season four.

Game of Thrones Ice and Fire: A Foreshadowing features new scenes from the fantasy drama, as well as interviews with cast members and behind-the-scenes footage.

Executive producer David Benioff said: "Some of the most shocking and mind-blowing scenes of the entire series come at the end of this coming season.

"This is definitely the most dangerous season for Tyrion. It seems like in almost every episode he's in jeopardy of getting his head removed from his shoulders."

The video, which sees Pedro Pascal appear as Prince Oberyn Martell, also features images of King Joffrey (Jack Gleeson) and Margaery Tyrell's (Natalie Dormer) lavish wedding.

HBO will air the season premiere of Game of Thrones on Sunday, April 6 in the US, and it was features on Sky Atlantic a day later.

Watch the Game of Thrones season four preview below.