At the Game of Thrones‘ SXSW panel, showrunners David Benioff & Dan Weiss revealed how they pranked Kit Harington during filming of the first season (scene where Jon Snow faces off a wight and later burns him), admitting that it made him ‘really sad’. Instead of giving Harington the actual script, Benioff revealed that they shared a fake script which would disfigure Jon’s face for rest of the series:
“We wrote a scene for Kit Harington where his face melted off. It was his upper lip and all of his hair…Kit’s got great hair and a great pout.”
“He was a good sport about it, but you could tell he was really sad.”
You can watch the scene below.