Harry Potter and the Half-Blood Prince is a 2009 fantasy film directed by David Yates from a screenplay by Steve Kloves. It is based on the 2005 novel by J. K. Rowling. The film serves as the sequel to Harry Potter and the Order of the Phoenix (2007) and represents the sixth installment in the Harry Potter film series. It stars Daniel Radcliffe as Harry Potter, alongside Rupert Grint and Emma Watson as Ron Weasley and Hermione Granger respectively. The narrative follows Harry's sixth year at Hogwarts as he obtains a mysterious textbook, experiences romantic feelings, and works to retrieve a critical memory about Lord Voldemort's vulnerability.