Lucas forced himself to write Episode III

Hollywood mogul George Lucas struggled so much with writing the screenplay for final Star Wars installment Episode III - Revenge of the Sith, he had to force himself to stick to a rigid working day as he sought inspiration.

The hugely successful movie-maker, 60, took on the persona of a normal office worker as he sat at his desk for nine hours a day, five days a week - and he still only managed to produce five pages everyday.