They changed the end of LOTR also.
Don’t give away the book, I am just at the beginning of the “Treebeards” in the second novel. ;) I saw the movies.
Yea, made the mistake of watching that one. Never again.
Uh... In what material way?
They changed a lot of things in all three of the LOTR movies. One example: Arwen was not such an active character in the books, but emerged as such in the first movie—in the book, it was an elf called Glorfindel that met Strider and the Hobbits when the Nazgûl were pursuing them en route to Rivendell, and it was Elrond and Gandalf that “commanded” the flood at the ford of the river Bruinen that washed the Nazgûl and their horses downstream, not Arwen.
(The cartoon directed by Ralph Bakshi replaced Glorfindel with Legolas, BTW.)