Casting director Nina Gold first spotted Harington when he was starring in a 2009 London production of "War Horse." She brought him in for an audition, and the rest was history.
"I remember that he was quite tired, because he'd been doing eight shows a week in 'Warhorse' for a year," Gold told Insider in a 2017 interview. "Then he started doing the audition and playing Jon Snow and he was completely brilliant. I do recall the emotional impact of his audition and being blown away. Kit is a phenomenal actor."