Exclusive: White Bird star Ariella Glaser has boarded Flavia, the Martin Freeman-starring adventure movie about an 11-year-old detective.

Glaser stars as Ophelia de Luce, the sister of the movie’s protagonist, who is played by Molly Belle Wright. Freeman, Jonathan Pryce and Toby Jones are also aboard.

Flavia is based on the Alan Bradley series of books centered on the pre-teen detective. The movie from Bharat Nalluri and Daisy Jones and the Six writer Susan Coyne starts with the main character finding a dead body at her decaying British manor house, with her father accused of the murder. She subsequently dives into her own investigation, unearthing long held family secrets and pitting herself against the true murderer. The movie comes hot on the heels of the BBC-Netflix’s A Good Girl’s Guide to Murder adaptation, which also follows a young amateur sleuth.

Sky recently picked up Flavia...