As we know, Harry Potter has a similar battle against dark wizards and magical powers, so film critics think the two films will be in competition with each other.
But Jackson insists he loves Harry Potter and fantasy fans will watch both film series rather than just one.
The Lord of the Rings was made in New Zealand where special tourist maps listing the film's 35 filming locations have been produced. There are similar tourists maps for the UK filming locations of Harry Potter.
The world première of The Fellowship of the Ring is in London on 10 December.
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