The artwork teases the HBO show's return on March 31, 2013.
The third season of the fantasy epic based on George RR Martin's Song of Ice and Fire books sees a host of new stars join the series.
Dame Diana Rigg, Mackenzie Crook, Clive Russell and Kerry Ingram will all take on roles in the upcoming run.
Coldplay drummer Will Champion and Snow Patrol frontman Gary Lightbody have also been confirmed to appear in future episodes.
Jon Snow actor Kit Harington recently claimed that season three is his "favourite season so far".
"I'd definitely say our budget's bigger for season three - you can feel it on set," Harington said.
"I'll put it this way: season one was a big impact season, season two was more story[-led], season three is another impact season."
Watch a Game of Thrones video introducing the new characters and actors below: