Children's and young adult author Lois Lowry says on her official Blog that Harry Potter and the Order of the Phoenix and Harry Potter and the Half-Blood Prince director David Yates will be returning to helm the seventh and last film, Harry Potter and the Deathly Hallows:

Bad news from The Giver Movie front. David Yates, the director currently working on the next Harry Potter film, was supposed to begin The Giver film next. But he has just decided he wants to do the final Harry Potter first, thereby postponing The Giver by several years. Maybe the opening of this film could be held simultaneously with my celebration-of-life service after I succumb to old age? Or the producers will decide to get a different director. Stand by. But without holding your breath.

It hasn't been officially confirmed by Warner Bros. Pictures, which is planning a 2010 release date for the film.