"Constantine" was written using some elements from Garth Ennis's "Dangerous Habits" story arc (issues #41–46) and others, such as the inclusion of Papa Midnite, from the "Original Sins" trade paperback. The film changed several aspects of the source material, including a number of cosmetic changes to the lead character's appearance, e.g., Reeves played the role with his natural accent and hair color whilst the original character was intentionally drawn to resemble English musician Sting and originally came from Liverpool. The film was also set in Los Angeles; the director pointed out that the comic book was not exclusively set in London either.