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 were killed.
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.
One of the expert witnesses in the film is Richard J. Evans, a highly respected scholar in modern European history. During the trial, he and David Irving argued vigorously over the historical truth of the Holocaust and he was one of the major experts who helped discredit Irving as a credible historian. In addition, Evans would later write the hailed in depth history book series on Nazi Germany, The Third Reich Trilogy.
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.