Before they led their own HBO adaptation with “The Last of Us,” Bella Ramsey made their television debut on “Game of Thrones,” playing Lady Lyanna Mormont across the final three seasons of the series. In one of their first acting jobs, an 11-year-old Ramsey shared a scene with series star Kit Harington, who played Jon Snow. The pair recalled their time working together in a new conversation hosted by Interview Magazine — and the “humiliating” moment when Ramsey had to remind Harington of what his line was.

“I don’t know whether you remember this, but I remember it quite vividly and have some remorse for it now, but during that scene I was mouthing your lines to you,” Ramsey told Harington. “Now I’m like, ‘Oh my gosh, how awful.’ But at the time it came from a very innocent place of being like, ‘Kit’s struggling with his line and I know it,...