Main Cast:
* Daniel Radcliffe as Harry Potter
* Rupert Grint as Ron Weasley
* Emma Watson as Hermione Granger
* Robbie Coltrane as Rubeus Hagrid
* Alan Rickman as Severus Snape
* Maggie Smith as Minerva McGonagall
* Michael Gambon as Albus Dumbledore
* Gary Oldman as Sirius Black
* Imelda Staunton as Dolores Umbridge
* Evanna Lynch as Luna Lovegood
* Matthew Lewis as Neville Longbottom
* Bonnie Wright as Ginny Weasley
* Tom Felton as Draco Malfoy
New Cast Members:
* Ralph Fiennes as Lord Voldemort
* Brendan Gleeson as Alastor "Mad-Eye" Moody
* David Thewlis as Remus Lupin
* Natalia Tena as Nymphadora Tonks
* Jason Isaacs as Lucius Malfoy
* Shirley Henderson as Moaning Myrtle
* Warwick Davis as Griphook
* Julie Walters as Molly Weasley
* Mark Williams as Arthur Weasley
Supporting Cast:
* Oliver Phelps as George Weasley
* James Phelps as Fred Weasley
* Devon Murray as Seamus Finnigan
* Alfred Enoch as Dean Thomas
* Katie Leung as Cho Chang
* Chris Rankin as Percy Weasley
* Lee Jordan as Lee Jordan
* Josh Herdman as Gregory Goyle
* Jamie Waylett as Vincent Crabbe
* Louis Cordice as Zacharias Smith
* Eleanor Columbus as Susan Bones
This list includes the most prominent characters in the film. There are many other supporting actors who played smaller roles in the story.