Spoilers for Game of Thrones season 6 below, of course.
She's known by her family, friends, and vassals as Bella Ramsey, and she apparently wasn't allowed to watch Game of Thrones before she got the part.
HBO: Had you seen the show before filming your scenes?
Bella Ramsey: When I knew I got the part, I was allowed to watch a few suitable snippets. I was interested to see the bit in Season 5 when Stannis [Baratheon] received Lyanna's letter.
Wow. It's a violent, brutal show—and she's 12—so it makes sense. But hopefully she gets a courtesy HBO password now, at the very least to watch, um, Vinyl? Actually, is there any show on HBO that's appropriate for a child?
At one point in the interview, she's asked about her character's namesake. If it wasn't actually an HBO rep asking the questions, you might think they were trying to elicit a spoiler. Lyanna Stark is widely believed to be Jon Snow's mother, a long-held theory that was almost certainly confirmed in the latest season finale.
HBO: Did they tell you about the character you are named after?
Bella Ramsey: Not really. I knew that Lyanna was named after her, but that's all I needed to know, I think. Lyanna Mormont is very much her own person.
Bella was *this* close to blurting out: "HELL YEAH, HER PLUS RHAEGAR EQUALS JON SNOW, CONFIRMED." But she kept her cool.
Ramsey also shares her approach to acting, and how the show's affected her life. Although it's a brief interview and her responses are never more than a few sentences, it's interesting nevertheless to hear a 12-year-old's take on being at the center of a culture phenomenon:
It took me a while to realize it. I actually woke up one morning and the first thing I thought was, “Wow, I really am integral to the storyline.”
Yes, you are. May your childhood stardom never affect your adult sanity. All hail Lyanna Mormont.