Elijah Wood spoke to CBBC Newsround's Lizo Mzimba about the pressure of being the main character in the Rings films.
Was it different playing Frodo in this film?
It was a lot more fun actually. I got to sort of begin to destroy Frodo over a period of time, and sort of etch away at his soul which was very difficult and quite a lot of fun to play.
And in terms of trying to manifest what the Rings is doing to them over a period of time. The Rings do definitely get a lot darker in this movie.
How difficult is it filming scenes out of sequence?
That proved to be difficult at times. I remember there was actually a period of time where we were filming primarily film one. And then we jumped to film three out of nowhere.
I hadn't really started to prepare for film three and Frodo's vastly different there. So that kind of freaked me out and took a couple of hours for us to figure it all out but I think we managed to make it work OK.