Trivia: Elijah Wood's (Frodo) sister Hannah, is in the film. She's the lone, blonde, lost-looking girl, clutching her shawl with her left hand, at the beginning of the shot in the Glittering Caves, at Helm's Deep when the women and children go in. She is also on the stairs for Theoden's return. (00:51:55)
Trivia: Usually when the people in charge of the scenery need to make a life-size model of something, they create the smaller version and then create the life-size one as much like it as possible. However, it was the other way around with Helm's Deep: the life-size model was built first (with an easily collapsible wall) and the miniature for it was built later.
Trivia: In Helm's Deep, when women and children retreat to the caves, look closely at the children. They're the same actors as the Hobbit children listening to Bilbo's story of the trolls at his birthday party in "Fellowship" and they're in RotK as well. They're the children of director Peter Jackson and writer Fran Walsh.
Trivia: Many of the major shots depicted in the movie are duplicates of Alan Lee's illustrations, in the LotR books, that had been published years before. In many shots, the actors were positioned in the same poses, as the drawings in the books. One example is, when Frodo pulls Gollum's head back and holds Sting up to his throat. (00:10:40)Super Grover
Trivia: While one of the most accomplished horsemen of the Fellowship, Viggo Mortensen (who loves and own horses) was united with a horse who tended to kick into reverse gear in busy shots. As a result, much film was wasted re-taking scenes in which Aragorn backed right into the crowd he was trying to escape from.
Trivia: During the location shooting at Edoras, there were very strong winds, as can be seen by the actors' hair, especially Éowyn's. During one particular day's filming, the wind was so strong that it tore Peter Jackson's glasses right off his face, and blew them straight down the hill. He had to spend the rest of that day without them.Super Grover
Trivia: In the battle for Helms Deep, a man falls and the famous "Wilhelm" scream is heard as he falls. This is a signature sound effect, recorded in 1951 at Warner Bros., used as frequently as possible by sound supervisors at George Lucas's Skywalker Sound and Weddington Productions in Los Angeles, CA. On the "Rings" trilogy, two of the re-recording mixers and at least one of the sound effect designers work for Skywalker.
Trivia: The Warg scene that includes the infamous shot of Legolas leaping onto the horse, was filmed on the same day that Orlando Bloom fell off his horse and cracked his rib. He landed on a rock and Gimli's scale double (Brett) fell on top of him. So the filming crew could not film Bloom actually jumping onto his saddle, because of the injury. Later in post-production, about six months before the release of "The Two Towers," Bloom had grown a beard, for the filming of "Ned Kelly" (2001). He was not permitted to shave, which meant he could not do the pickups for this scene in "The Two Towers," so the CG animators at WETA created a CG Legolas to do the actual springing onto the horse. (00:10:35)Super Grover