According to Deadline, Keira Knightley is attached to star in a new British Christmas film titled Silent Night with 12-year-old Golden Globe Nominee Roman Griffin Davis ( JoJo Rabbit ), Matthew Goode ( Downton Abbey , Official Secrets ), and Annabelle Wallis ( Peaky Blinders ). Filming is said to be underway next month, February 17th. When Deadline first reported this earlier today ... Casting is underway for the role of Knightley’s husband in the film . The couple’s screen son will be played by Jojo Rabbit child star Roman Griffin Davis. The project will mark the feature directorial debut of Camille Griffin (Griffin Davis’s mother) who has also scripted. Side Note: When I first read casting news this afternoon, I was hoping the casting gods would cast Matthew Macfadyen for the role of Keira 's husband in this film (as I thought it would be another great reunion for Keira & Matthew since it's been a long time since they last co-starred in Pride & Preju...