Kit Harington knew he had to "up [his] game when he was "humiliated" by Bella Ramsey in a 'Game of Thrones' scene.
The 38-year-old actor felt he had complacent playing Jon Snow after six seasons when his then-11-year-old co-star - who plays Lady Lyanna Mormont - tried to give him a prompt when he'd forgotten a line of dialogue.
