"Are you going to get married, or?" Kidman asked the actor, who seemed surprised and said, "Oh, wow ... God."
"No, I just think it's kind of nice if you're going to live together maybe to at least get engaged," the Oscar- winning actress stated.
"I've been put on the spot by Nicole Kidman! I mean, it's step by step, step by step," Harington said.
Host James Corden too seemed surprised and said, "Oh... You're not one for pre-marital ... Wow."