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The photos allegedly show that Harington attended the show's wrap party. The man in the photos does appear to be the English actor who plays Jon Snow, though it's hard to be certain as the photos are quite blurry.
See them below:
When we last saw Jon Snow on season five, he had been attacked by members of the Night's Watch - each taking a turn at stabbing the newly elected Lord Commander. He was left to bleed out in the snow.
While HBO top brass, co-stars, and Harington himself have said Jon Snow is either dead or not returning, fans have continued a constant vigil for the beloved character's return.
Harington sightings have propelled fans to believe that the character will be back. Others feel the show hasn't completed his story.

HBO
Jon Snow died on 'Game of Thrones,' or maybe not?
And Harington recently said he hasn't come to accept it.
"Do I think people taking photos of you without your permission is rude? Of course I do. I deal with it a lot," Haringtonhe told Vulture while promoting his newest movie, "MI-5." "There's a lot of camera phones being pointed at me in not such a subtle manner."
"Game of Thrones" returns in April 2016.