HBO is diving into the fantasy genre with 'Game of Thrones,' a new series based on George R. R. Martin's bestselling 'A Song of Ice and Fire' novels. The Live Feed has posted the show's first teaser trailer, which features the tagline "Winter Is Coming" and a few quick flashes of what looks to be one of the cable network's most epic and ambitious new shows in years.

'Game of Thrones' stars Sean Bean, Peter Dinklage, Nikolaj Coster-Waldau, Lena Headey and Jason Momoa in a recurring role. The show is set in a fictitious world where magic exists and the ruling empire is in shambles. The series chronicles the conflicts of kings, queens, mercenaries and warlords as the they battle for control of the throne.

The show, which begins production on July 26, is set to premiere next spring or early next summer.

Watch the trailer below and consider the question: Are you ready for winter?

Winter Is Coming