A "Save the Rose Theatre" press day to support Sam Wanamaker, was held near the end of filming. Two of the actors in attendance performed speeches. Gérard Depardieu not only dubbed the title role in French, circa May 1989, but also helped to secure distribution for this movie in France. In thanks, Sir Kenneth Branagh cast him in Hamlet (1996) in the small role of Reynaldo (Polonius' servant). Branagh and Depardieu have also shared the role of Cyrano de Bergerac.
As Falstaff is dying, the screenplay interpolates a flashback scene from (and a paraphrase of) Act 2, scene 4 of William Shakespeare's play Henry IV, Part 1. In it, Falstaff jokingly tells Prince Hal (later to become King Henry V) that when he is King, he may stop socializing with all their other friends, but he shouldn't banish Falstaff himself from his company: "banish plump Jack, and banish all the world."
Montjoy (Christopher Ravenscroft), the French herald, was expanded from a minor role in the play, to a more prominent role in the movie, by giving the lines of multiple characters to this one role. For instance, in the movie, Montjoy brings in the reports of the dead. In the play, this is done by an English herald. Here, this action highlights the increasing civility towards King Henry that is shown in Montjoy and the French nobles and Princes alike.
Kenneth Branagh (King Henry V) is the last actor to receive an Academy Award nomination for his role in a Shakespearean film. He was nominated for Best Actor but lost to Daniel Day-Lewis for his performance in My Left Foot (1989).
This movie reunited Sir Ian Holm and Robert Stephens from BBC's radio drama "The Lord of the Rings" (1981). In that play, Frodo Baggins (Holm) was a follower of Lord Aragorn (Stephens). Here, the roles are reversed, with Stephens playing Auncient Pistol, a low-ranking soldier under the command of Holm's Captain Fluellen.
The trivia items below may give away important plot points.
Sir Kenneth Branagh said in an interview that carrying the "corpse" of Christian Bale caused him terrible back pain. He carried his dead weight for the whole of a long tracking shot. The look on his face was genuine pain and not acting.
Contains a flashback scene to ACT 1, Scene 2: of William Shakespeare's "Henry IV, part 1", where Jack Falstaff proclaims "Do not thou, when thou art King, hang a thief." This flashback line is instead given to Bardolph, to make it more poignant when Henry hangs him.