Trivia: Translations for the Latin HABEAS CORPUS include "show me the body", "you have the body", "you should have the body", "produce the body", and "you shall have the body." The "body" in question refers to a person being held in detention or confinement and "show the body" refers to the judge/court being requested (petitioned) to bring the person to court to ascertain/assess the legality of the person's deprivation of liberty. No person should be deprived of liberty without "due process of law."
Trivia: In real life, Mary secretly married her second husband, William Stafford, while Anne was still Queen. Henry and Anne did not approve because Stafford had a low social rank and little money. Mary was banished from court, and her parents and uncle disowned her. Her final interaction with Anne was probably when Anne sent her a golden cup and some money, but still would not allow her at court. She was probably not present at the execution of Anne, like in this movie.
Trivia: Adam Driver was not allowed to drive any of the historic cars that feature in this movie due to insurance stipulations.
Trivia: Richard Farnsworth earned an Academy Award nomination for Best Actor for his portrayal as Alvin Straight. At the age of 79, Farnsworth was at the time the oldest person to be nominated for a Best Actor Oscar.