Downton Abbey star Allen Leech is the latest actor from the British period drama to make it onto the big screen.

Leech, who plays Tom Branson in the hit series, has signed up to star in upcoming movie The Imitation Game, alongside fellow British stars Benedict Cumberbatch and Keira Knightley.

The film, a biopic of scientist Alan Turing, who helped crack coded messages from the German military during World War Ii, is set for release next year (14).