The Hobbit trilogy is officially the most expensive movie series ever produced. New financial details reveal that the expenditure on the three films has totalled nearly three quarters of a billion dollars. The details, show that the Peter Jackson-directed trilogy has received among the biggest budgetary layouts in movie history. Financial documents were filed earlier this month in New Zealand, where the films are shot, which state that production costs through to March 2014 have reached 745 million dollars.