http://TheTrailerSite.com for more HD trailersDirector: David YatesWriter: Steve KlovesCast: Daniel Radcliffe, Rupert Grint, Emma Watson, Helena Bonham Carter, David Bradley, Robbie Coltrane, Warwick Davis, Tom Felton, Michael Gambon, Alan Rickman, Maggie Smith, Natalia Tena, Julie Walters, David Thewlis, Evanna Lynch, Matthew Lewis, Bonnie Wright, Jim Broadbent, Helen McCrory, Jessie Cave, Hero Fiennes Tiffin, Frank DillanePlot: As Harry Potter begins his 6th year at Hogwarts School of Witchcraft and Wizardry, he discovers an old book marked mysteriously "This book is the property of the Half-Blood Prince" and begins to learn more about Lord Voldemort's dark past.Release Date: 15 July 2009 (USA)Genre: Adventure Drama Fantasy Mystery Romance