An authentic Star Wars fancy dress costume is expected to raise a fortune when it goes up for auction later this month.

The Darth Vader outfit, which is thought to be the one worn by James Earl Jones in The Empire Strikes Back, is being sold by an anonymous American collector at Christie's.

According to expert estimates, it could pull in as much as £230,000 as fans and sci-fi enthusiasts clamour to get their hands on a piece of movie history.

However, it will not be the first Star Wars prop to have been sold for a remarkably high fee.

The Telegraph states that in 2008, a TIE fighter from A New Hope - the first installment in the original trilogy - fetched £203,767, while paper blueprints for the Millennium Falcon went for £5,200.

November 25th 2010 is to be the date for the Darth Vader auction.

Back in July, theatre group Improv Everywhere caused an internet sensation when they sported Star Wars fancy dress and acted out scenes from the movie on the New York subway.