The Dark Knight was the highly anticipated sequel to the successful 2005 film Batman Begins. It was produced by Legendary Pictures and Warner Bros, who have produced every Batman film since 1989. Christopher Nolan returned as director with his brothers as co-writers. The film had a $185 million budget and principal photography took place between March-November 2007 in locations around the world. It was released in July 2008 to huge commercial and critical success, grossing over $1 billion worldwide. Its marketing campaign began over a year before release and was considered hugely successful.