The language spoken by the invaders in the film is a totally made up language, sampled from many languages worldwide and then scrambled.
The film is based off the first of the 7 books it was originally supposed to turn into a trilogy, but did not as the company could no longer afford to due to a loss of revenue in other projects.
The highest grossing Australian movie of 2010, with over $13,000,000.
Margot Robbie auditioned for the role of Fiona.
The Australian cities of Townsville and Port Hedland are mentioned in the film during a radio broadcast. In the novels, all of the cities/towns referenced in Australia are fictitious.