Millie Bobby Brown struggled to speak in her native British accent after starring on hit Netflix show Stranger Things, it has been revealed.

The actress, 16, was catapulted to international stardom when she took on the role of Eleven in the sci-fi drama.

Now, she has admitted that, after speaking in an American accent for most of her on-screen career, she found it "challenging" to speak in a British one.

Dorset-raised Millie is set to star in the upcoming Netflix adaptation of Sherlock, playing the role of Enola Holmes.

The Marbella-born actress told Radio Times: "For the last five years I've been playing an American character in Stranger Things and I found it really challenging being British in this, even though I am a Brit."

Millie stars in the latest Netflix film, Enola Holmes

She went on to add: "I had to learn how to speak again because I'm so used to speaking in an American accent."

Despite being a critically acclaimed actress, Millie can now add film producer to her glittering CV after revealing that she is responsible for the film process.

She revealed that she and sister Paige "fell in love" with Enola after first reading The Enola Holmes Mysteries and urged her parents to produce the film.

The actress revealed she had become so used to speaking with an American accent, she struggled to use her native British accent

"We went to my mum and dad, who owns a production company and said, 'We're so inspired by her. This needs to be a film.'"

She added: "My sister and I are producers as we felt it was only right to have girl power behind the scenes, too."

The upcoming flick is focused on Nancy Springer's Enola Holmes series and follows Holmes as she sets out on a mission when her mother Eudoria goes missing.

Millie is credited as a producer on the film, produced by her parents

Millie will star alongside the likes of Henry Cavill who is taking on the role of Sherlock and fellow Brit, Sam Claflin, who is playing Sherlock's brother, Mycroft.

The Crown actress Helena Bonham Carter who is playing Eudoria.

Enola Holmes launches on Netflix on September 23.

The full interview is in this week's Radio Times magazine.