After opening up about their gender identity earlier this year, Bella Ramsey has confirmed they’re not “100 percent straight”.

In an interview with British Vogue, the actor expanded on their comments about their preferred use of pronouns, saying “they/them” is the “most truthful thing” for them.

“That’s who I am the most,” Ramsey explained, before adding of their sexuality: “You never fully know who you are, it’s ever-evolving. But I certainly think that people have gathered that I’m not 100 percent straight.

“I’m a little bit wavy, you know? That’s what I like to say.”

Ramsey, who rose to fame as Lyanna Mormont on Game of Thrones, earned critical acclaim and worldwide recognition as Ellie in HBO’s post-apocalyptic drama The Last of Us.

Ahead of the series’ debut earlier, Ramsey told The New York Times that their gender has “always been very fluid”.

“Someone would call me ‘she’ or ‘her’ and I wouldn’t think about it, but I knew that if someone called me ‘he’ it was a bit exciting,” said the star, who opts for “non-binary” on a form when it’s an option. “I’m very much just a person.”

“Being gendered isn’t something that I particularly like, but in terms of pronouns, I really couldn’t care less,” they said.

In their British Vogue interview, Ramsey praised the crew on The Last of Us for supporting their queer identity.

“The costume supervisor would put several different undergarments in my room: a regular bra, a binder, a sports bra. She’d say, ‘You just pick whatever is most comfortable for you today,'” they explained.

“And in the end, it was just a binder. There was never anyone pressuring me.”

Ramsey is set to star in the second season of BBC’s acclaimed drama Time.

A “moving and high-stakes portrayal of life inside a women’s prison”, the three-part series will also star Jodie Whittaker (Doctor Who) and Tamara Lawrance (The Silent Twins), with Siobhan Finneran reprising her role from season one as prison chaplain Marie-Louise.

Ramsey, Whittaker and Lawrance will respectively play Kelsey, Orla and Abi, three new inmates who “face an unfamiliar world” as they arrive at Carlingford Prison on the same day.

According to the synopsis: “But even with the ever-present threat of violence within its walls, they discover that an unexpected sense of community, and a shared understanding, still might be possible.”

In a statement, Ramsey said they are “very happy to be a part of this project, working with an incredible team and following on from a stellar first season. And it’s such an honour to be Kelsey, I’m really excited to experience the world through her for a few months.”