Millie Bobby Brown Plays Sherlock's Sister in the Trailer for New Netflix Movie 'Enola Holmes'

Sometimes, he's played by an over-the-top Robert Downey Jr. As TV fans know, sometimes a curmudgeonly Benedict Cumberbatch does the honours. Ian McKellen has even taken the job, as has Will Ferrell. In fact, on the big and small screens for over a century, a lengthy list of actors have stepped into Sherlock Holmes' shoes and worn his deerstalker cap. But Netflix's new film isn't really about the famed sleuth — instead, it's about his sister.

As brought to the screen by Stranger Things' Millie Bobby Brown, Enola Holmes is the family's youngest sibling. Naturally, she has a mystery to solve — she is a Holmes, after all. When her mother (Helena Bonham Carter) goes missing on the morning of Enola's 16th birthday, it's up to the teenager to find out where she has gone and why. Her brothers, Sherlock (Henry Cavill) and Mycroft (Sam Claflin), aren't too pleased, though. They're not very happy with her demeanour either, and would rather send her to a finishing school to learn how to become a 'proper' young lady.

As the just-dropped full trailer for Enola Holmes shows, yes, Enola does say "the game is afoot". She also becomes caught up in quite the adventure, as based on Nancy Springer's young adult book series. This is a period-set version of the Holmes story, too, not a modernised one — so expect to see Enola flit around 1880s England when the movie hits Netflix on September 23.

In addition to Brown, The Crown's Bonham Carter, The Witcher's Cavill and The Nightingale's Claflin, the film also stars Medici's Louis Partridge as a young runaway Lord who crosses Enola's path. Behind the camera, Fleabag and Ramy's Harry Bradbeer directs — with the filmmaker earning an Emmy in 2019 for the former.

Check out the trailer below:

Enola Holmes hits Netflix on September 23.

Image: Alex Bailey.