Harry Potter and the Half-Blood Prince is an upcoming 2009 fantasy adventure film, based on the novel by J. K. Rowling. It is the sixth film in the popular Harry Potter films series. Production is in the post-production stage. David Yates, the director of the fifth film, Harry Potter and the Order of the Phoenix, is returning as director for this film. David Heyman and David Barron are producing the film,and Steve Kloves, though he did not write the fifth film, has returned as screenwriter for this instalment Filming began on 24 September 2007 and the film was originally planned for a UK and US release on 21 November 2008, but on 14 August 2008, it was announced that the release date for the film was to be pushed back to 17 July 2009.Like the previous film, the sixth film will be simultaneously released in regular theatres and IMAX 3-D.