All the dialogue in the courtroom scenes is taken verbatim from the trial records.
Rachel Weisz and a small film crew were given permission to film at Auschwitz Birkenau, the Nazi death camp in Poland where almost one million Jews died.
The real Deborah Lipstadt was amused by how much more glamorous than her Rachel Weisz is in the film: "I dressed nicely for the trial, but I am not elegant: I am a professor!" Nonetheless the scarves Weisz wears were loaned to her by Lipstadt.
Twice in the movie Deborah Lipstadt is shown out jogging in London whereupon she stops to gaze upon the statue of "Boadicea and Her Daughters" on Westminster Pier. Boadicea was famous as a warrior queen who led an unsuccessful uprising against the Romans.
When Deborah and Richard visit Krakow Poland, there is a trumpeter playing from the top of a church. That is St. Mary's church, and the trumpet playing is called St. Mary's Trumpet Call. A trumpeter plays a five-note anthem every hour on the hour to denote the time.