The third Harry Potter film, Prisoner of Azkaban, helped UK film production spending reach a record high in 2003, according to the UK Film Council.
Hollywood blockbusters like Troy, starring Brad Pitt, also helped the massive £1.17 billion spend.
There were 25% more films made just in the UK, and 85% more foreign film makers used the UK as a location.
Steve Norris, from the Film Council said that the UK was "one of the best places in the world to make a film."