The Two Towers is the fifth-highest grossing movie ever

Over 50,000 pre-orders have been taken ahead of the video and DVD's release on Tuesday.

Harry Potter and The Chamber of Secrets was the previous record-holder, having taken 40,000 pre-orders in April.

Released in cinemas in December 2002, The Two Towers has so far taken over �576m around the world.

"It has well and truly knocked Potter off the top spot, and there are still six days to go until the release date," said Amazon media products director Greg Hart.

The DVD version comes in a two-disc package, which includes a preview of the third Lord of the Rings movie, Return Of The King, which is due out in December this year.