Mary Surratt's house remains as a historic museum in what was then Surrattsville, Maryland. The U.S. Post Office soon renamed the town Robeysville, due to the notoriety of the Surratt name. In 1879, Robeysville was renamed to Clinton, Maryland.
The look of the film was influenced by early photographs of the period, many of which tried to introduce elements of color over sepia. Director of photography Newton Thomas Sigel attempted to emulate that look whilst restricting the use of bright, artificial light.
John Cullum had virtually no time to prepare for his one scene as it had only been written a day and a half before it was filmed. Indeed it was shot in just a couple of hours and edited that very same day.
Robert Redford insisted that the actors stay in costume as much as possible so that the clothes would start to feel natural to them. Most of the actors complained about this at some point or other as the locations were unbearably hot.
Toby Kebbell plays John Wilkes Booth, the man who assassinated Abraham Lincoln. Kebbell is no stranger to this kind of role. He previously played Pausanias, who assassinated Philip II of Macedon (father of Alexander the Great) in Alexander (2004).