“America is quite scared of bums,” she told Radio Times. ”And nipples. We had to make sure there were no bums and nipples out. I don’t know why. Such strange people.
“My parents were very cool and made sure we watched lots of European films when we grew up, so nudity has never been a problem for me, as long as it’s done beautifully.”
The 22-year-old up-and-coming actor, who broke out thanks to a leading role in Lady Macbeth, plays Charlie – a young actor sucked into the world of espionage – in the John Le Carre adaptation. She stars alongside Michael Shannon and Alexander Skarsgard.
She continued: “I don’t think I’m going to be an international sex symbol. I mean, I know I’m not going to be an international sex symbol.
“But there is a big potential that when this series comes out, life will be very different.”
The actress has accepted comparisons to Kate Winslet, admitting that she would re-enact scenes from Titanic as a young girl.
The Little Drummer Girl airs 28 October, 2018 on BBC One.