NEW HAIR DO: What does Kit Harrington's new hair do say about the future of his Game of Thrones character Jon Snow.

Jon Snow's hair is going - so could a Game of Thrones plot twist be coming?

Kit Harington, the 28-year-old star of the HBO drama, was sporting a new shorter haircut when he attended the premiere of his new film Testament of Youth in London today.

READ MORE: Kit Harington's one problem with being in GOT

Gone were the signature Snow curls, replaced by a sexy, slicked-back 'do.

Harington's new look is certain to set fans' tongues wagging for more than just aesthetic reasons - the English actor has previously said he was under contractual obligation to never cut his hair as long as he was on the show.

The contract is supposedly so strict that when filming Testament of Youth last year, in which his character is meant to have short hair, Harington was forced to wear a wig in order to keep his luscious locks intact.

So his new chop could have interesting implications for the future of the show, as well as the next novel in George R. R. Martin's epic saga.

STOP READING NOW IF YOU DON'T WANT TO KNOW WHAT HAPPENS IN THE LATEST GAME OF THRONES BOOK.

The most recent book, A Dance With Dragons, published in 2011, ends on a massive cliffhanger after Snow is stabbed multiple times - appearing to be dead.

But when asked at the time by Entertainment Weekly why he killed the character off, Martin replied: "Oh, you think he's dead, do you?"

Fans of the books will have to wait for Martin's forthcoming novel, The Winds of Winter, to be released to find out about Snow's fate.

But fans of the HBO show may soon have an answer - if Harington's haircut is anything to go by.