Sienna Miller Joins Ben Affleck's Live By Night
British actress recruited to star alongside Argo filmmaker in new movie...
The film will be an adaptation of Dennis Lehane's The Given Day and will also star Zoe Saldana and Elle Fanning - along with Affleck himself.
Affleck will be directing and writing the script for the project, as well as starring in it.
It will tell the story of a policeman's son who becomes involved in organised crime in Prohibition-era Boston - and Deadline reports that Miller will play a character called Emma, the love interest of a mob boss.
Saldana will play "a Tampa resident" called Graciella Suarez.
The film is set to open in October 2016.