Warner Bros. Pictures has debuted the new trailer for Harry Potter and the Half-Blood Prince online! Opening July 17 in conventional theaters and IMAX, the David Yates directed sixth installment stars 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 and Frank Dillane.
You can watch the new trailer via this link in various formats!