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.
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.
The internal court scenes were filmed at County Hall in Kingston Upon Thames England. There is a recreation of the Old Bailey court there which was used as a real court until the early 90's and now is used solely for film and TV work.