The character played by Bill Nighy holds guns with just a thumb and middle finger, with his index on the trigger. This unusual grip is because he suffers from Dupuytren's contracture, which means he can't straighten the ring and little fingers on each hand.
Bill Nighy and Emily Blunt played together (as father and daughter) in the BBC film Gideon's Daughter (2006). They both won a Golden Globe for their performance.
Bill Nighy and Rupert Grint played together in Harry Potter And The Deathly Hollows: Part 1
Emily Blunt appears in this film with Martin Freeman. Blunt's husband, John Krasinski, played Freeman's role in the American remake of The Office.
Helena Bonham Carter was originally cast as Rose, but had to drop out due to scheduling conflicts with Alice in Wonderland (2010).