Trivia: The producers have stated that "Jigsaw" was created as they wanted to bring the "Saw" series back, and they wanted to gauge audience interest in more films. When the film became a hit - earning about $100 million worldwide against a relatively tiny $10 million budget - a ninth film was announced, with a tenth also possible.
Trivia: When Hobbs gets sent to prison, Shaw calls him Hercules. Dwayne Johnson played Hercules in a previous movie.
Trivia: At the start of the film when Baby is walking with the coffees, the words to the song he is listening to are often seen on the walls as graffiti and on lamp posts as posters as he walks past.
Trivia: Sam Rockwell did ride-alongs with a Los Angeles police officer to prepare for his role. He also shadowed a police officer in Missouri, on whom he based his accent and some of his dialogue, as director Martin McDonagh didn't want Rockwell to use a strong Ozark accent.
Trivia: Shawn says at one point "Jules would never do a Hallmark movie." Maggie Lawson starred in a Hallmark movie called "My Favourite Wedding" the same year this was released.
Trivia: Christopher Plummer earned an Academy Award nomination for his performance as J. Paul Getty. At the age of 88, Plummer is the oldest acting Oscar nominee.
Trivia: Although relatively rare and quickly dwindling, there are still some (100,000?) functional payphones (coin-operated or credit card) in the US, including in New York. It is doubtful there would be one outside of Henry's elementary school, but pay phones are typically near public buildings.
Trivia: Keanu Reeves remained friends with Laurence Fishburne after the original "Matrix" trilogy concluded. One day they meet for dinner and Fishburne talked about how much he loved the first "John Wick." Reeves had a script for the sequel sent to him shortly after. In less than 24 hours, Fishburne responded by saying "I'm in!"