China's richest man Wang Jianlin and his conglomerate Wanda Group have poured 50 billion yuan (USD 8.3 billion) into the sprawling complex in the city of Qingdao. Construction has already started but the complex will only be operational from 2016.
Wang told a lavish and star-studded ceremony the development was part of China's bid to ramp up its "cultural power" on the world stage and create a "Chinawood" that could one day rival Los Angeles as a global centre of film.
But critics say censorship is hampering the Chinese film industry's ability to compete with Hollywood, and even those films that get a strong reception in China have difficulties in cracking the bigger US market.
Sprawling across 376 hectares (900 acres) on the outskirts of the eastern port city famous for its "Tsingtao" beer, the "Movie Metropolis" will have 20 studios including what is billed as the world's largest.
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It should produce "at least a hundred films a year", according to the Wanda Group, which says it has reached preliminary agreements to ensure that 30 foreign films will be shot there each year.
Kidman, dressed in black trousers and a cream jacket, was joined by fellow A-listers Catherine Zeta-Jones, Ewan McGregor and Christoph Waltz.
Cheryl Isaacs, president of the Academy of Motion Picture Arts and Sciences (AMPAS) which organises the annual Oscars, also attended the gala, saying she was "very enthusiastic" that the complex could turn Qingdao into "an international centre of cinema".
"I don't think it's a competition (with the Oscars), there is always room for great talents," he said. "I think Qingdao festival is a place where there will be more and more interaction" between actors and directors from the two sides of the Pacific, he added.
With 1.3 billion increasingly affluent people, China is also a major market for American film makers.
Last month Beijing and Hollywood resolved a row over tens of millions of dollars in owed local box office revenues.