Cast members have gathered in the U.K. as production gets underway. Here's what you need to know about the next installment.

Enola Holmes 3 is official in production and its cast confirmed! Production has begun in the UK on Netflix’s third installment of Enola Holmes. Millie Bobby Brown will return as the sleuth sister of Sherlock Holmes, and plenty of other cast members will be returning to reprise their roles.

The film is directed by Philip Barantini, the filmmaker who most recently helmed Netflix’s breakout hit series “Adolescence.” Meanwhile, Jack Thorne, who wrote the first two “Enola Holmes” films, returns to pen the third, once again based on “The Enola Holmes Mysteries” by Nancy Springer.