Watch Harry Potter and the Half-Blood Prince (2009) HD Full Movie Free on SolarMovie. Watch Harry Potter and the Half-Blood Prince (2009) online free. As Harry Potter begins his sixth year at Hogwarts, he discovers an old book marked as "the property ...As Harry Potter begins his sixth year at Hogwarts, he discovers an old book marked as "the property of the Half-Blood Prince" and begins to learn more about Lord Voldemort's dark past.