David Yates	...	(Director)
Steve Kloves, J.K. Rowling	...	(Writer)
Daniel Radcliffe	...	Harry Potter
Michael Gambon	...	Professor Albus Dumbledore
Dave Legeno	...	Fenrir Greyback
Elarica Johnson	...	Waitress
Jim Broadbent	...	Professor Horace Slughorn
Geraldine Somerville	...	Lily Potter
Bonnie Wright	...	Ginny Weasley
Julie Walters	...	Molly Weasley
Rupert Grint	...	Ron Weasley
Emma Watson	...	Hermione Granger
Helena Bonham Carter	...	Bellatrix Lestrange
Helen McCrory	...	Narcissa Malfoy
Timothy Spall	...	Wormtail
Alan Rickman	...	Professor Severus Snape
Oliver Phelps	...	George Weasley

Summary: In Harry Potter's (Daniel Radcliffe's) sixth year at Hogwarts School of Witchcraft, he finds a book marked mysteriously, "This book is the property of the Half Blood Prince", which helps him excel at Potions class and teaches him a few dark and dangerous ones along the way. Meanwhile, Harry is taking private lessons with Dumbledore (Sir Michael Gambon) in order to find out about Voldemort's (Ralph Fiennes') past so they can find out what might be his only weakness.