Harry Potter and the Half-Blood Prince is a 2009 fantasy-adventure film based on the novel of the same name by J. K. Rowling. It is the sixth film in the Harry Potter film series. It is directed by David Yates, the director of the fifth film, Harry Potter and the Order of the Phoenix. David Heyman and David Barron produced the film, and the screenplay was written by Steve Kloves, the screenwriter of the first four films. Filming began on 24 September 2007, and the film was released in cinemas worldwide on 15 July 2009, one day short of the fourth anniversary of the corresponding novel's release. In everywhere but the United States, the sixth film was simultaneously released in regular...