The film was shot entirely on location in Middle Earth, except for the Mordor scenes, which were of course blue screen work (Mordor isn't a real place)
Elijah Wood got the part of Frodo Baggins by demonstrating a skill to appear half as tall as he really was
In real life, Ian McKellen (Gandalf) is terrified of beards. Director Peter Jackson was forced to wear a mask when directing him.
The role of Aragorn was given originally to Ian McKellen, before they realised he was already playing Gandalf.
Orlando Bloom is entirely computer generated
Peter Jackson's wife and co-writer, Fran Walsh, is imaginary.
In the books, Saruman (Christopher Lee), is called "David". The name was changed because it wasn't fantasy enough
JRR Tolkein wrote the original novels after seeing Willow and Star Wars.
The giant elephants (Mumakil) are a reference to Dumbo.
Director's trademark: Film features dialogue and sound
Peter Jackson makes a cameo in all 3 movies. In the first he can be seen munching a carrot; in the second he throws a spear. In the third, he plays the Orc stronghold of Ciroth Ungol.