Some more very vital details have been released on the much awaited 'Game of Thrones' season 6 which plans on premiering early next year.

Veteran British actor Ian McShane has been casted in an undisclosed role, which returns the actor to a major television network since his stint on 'Deadwood.'

As many things this upcoming season, McShane's role is being tightly guarded, and given that the show will begin going it's own way from the book's continuity, there are no leads as to who he could be portraying.

"The show's tight-lipped production will not reveal any details about McShane's character, who's coming on board for the most mysterious season yet. Thrones is preparing to dive headlong into narrative territory not yet revealed in author George R.R. Martin's novels (and despite that opening sentence, McShane's character could theoretically appear in Westeros or Essos or somewhere in between)," writes EW.

Sources have only been able to gather that the actor won't have any high amounts of screen time, however his role will have significant importance.

"While Thrones has a reputation for making stars of its enormous ensemble cast more than casting already widely known performers, McShane is easily one of the most recognizable actors to ever sign on with the series. Plus, fans of his work-especially on the artfully written Deadwood-can easily imagine the actor fitting in with Thrones' lawless world and chewing on the show's Emmy-nominated dialogue," writes EW.

'Game of Thrones' plans to return next spring, and has recently been announced to be slated for at least 8 seasons.