Main Cast:
* Daniel Radcliffe as Harry Potter
* Rupert Grint as Ron Weasley
* Emma Watson as Hermione Granger
* Michael Gambon as Albus Dumbledore
* Alan Rickman as Severus Snape
* Maggie Smith as Minerva McGonagall
* Robbie Coltrane as Rubeus Hagrid
* Tom Felton as Draco Malfoy
* Evanna Lynch as Luna Lovegood
* Matthew Lewis as Neville Longbottom
* Bonnie Wright as Ginny Weasley
* James Phelps as Fred Weasley
* Oliver Phelps as George Weasley
* Jason Isaacs as Lucius Malfoy
* Gary Oldman as Sirius Black (appears as a memory)
* Imelda Staunton as Dolores Umbridge
* Brendan Gleeson as Alastor "Mad-Eye" Moody
* Ralph Fiennes as Lord Voldemort (appears as a memory)
Notable Supporting Cast:
* Natalia Tena as Nymphadora Tonks
* David Thewlis as Remus Lupin
* Warwick Davis as Griphook
* Shirley Henderson as Moaning Myrtle
* Mark Williams as Arthur Weasley
* Julie Walters as Molly Weasley
* Fiona Shaw as Petunia Dursley
* Richard Griffiths as Vernon Dursley
* Devon Murray as Seamus Finnigan
* Alfred Enoch as Dean Thomas
* Katie Leung as Cho Chang
* Robert Hardy as Cornelius Fudge
* David Bradley as Argus Filch
* Frances de la Tour as Madame Maxime
* Lee Jordan as Lee Jordan
Note: This is not an exhaustive list, but it includes some of the most prominent and recognizable actors and actresses in the film. There are many other talented performers who contributed to the film's success.