Kit Harington on getting cast in 'Eternals' and working with his 'Game of Thrones' costar Richard Madden again

Harington tells Insider how he wound up in a Marvel movie after previously turning down a superhero role, how he never auditioned to be an Eternal, and how he really wants someone to let him and his friend and "GOT" costar Richard Madden work together in more than just a few scenes.