Daniel Radcliffe-Harry Potter
Rupert Grint-Ron Weasley
Emma Watson-Hermione Granger
Richard Griffiths-Uncle Vernon
Fiona Shaw-Aunt Petunia
Harry Melling-Dudley Dursley
Toby Jones-Dobby the House Elf (voice)
Jim Norton-Mr. Mason
Veronica Clifford-Mrs. Mason
James Phelps-Fred Weasley
Oliver Phelps-George Weasley
Julie Walters-Molly Weasley
Bonnie Wright-Ginny Weasley
Mark Williams-Arthur Weasley
Chris Rankin-Percy Weasley
Tom Felton-Draco Malfoy
Jason Isaacs-Lucius Malfoy
Edward Tudor-Pole-Mr. Borgin (scenes deleted) (as Edward Tudor Pole)
Jenny Tarren-Aged Witch
Robbie Coltrane-Rubeus Hagrid
Tom Knight-Mr. Granger
Heather Bleasdale-Mrs. Granger
Isabella Columbus-Girl in Bookstore
Kenneth Branagh-Gilderoy Lockhart
Peter O'Farrell-Short Man - Daily Prophet
Ben Borowiecki-Angus (Diagon Boy)
Harry Taylor-Station Guard
Matthew Lewis-Neville Longbottom
Devon Murray-Seamus Finnigan
David Bradley-Argus Filch
Alan Rickman-Professor Snape
Richard Harris-Albus Dumbledore
Maggie Smith-Professor Minerva McGonagall (as Dame Maggie Smith)
Jamie Waylett-Vincent Crabbe
Joshua Herdman-Gregory Goyle (as Josh Herdman)
Miriam Margolyes-Professor Sprout
Gemma Padley-Penelope Clearwater
John Cleese-Nearly Headless Nick
Hugh Mitchell-Colin Creevey
Alfred Enoch-Dean Thomas
Eleanor Columbus-Susan Bones
Sean Biggerstaff-Oliver Wood
Rochelle Douglas-Alicia Spinnet
Emily Dale-Katie Bell
Danielle Tabor-Angelina Johnson
Jamie Yeates-Slytherin Keeper Bletchey (as Jamie Yeats)
Warwick Davis-Professor Flitwick
Violet Columbus-Girl with Flowers
Peter Taylor-Man - Moving Picture
Luke Youngblood-Lee Jordan
Scott Fern-Marcus Flint
David Holmes-Adrian Pucey
David Massam-Slytherin Beater #2
Tony Christian-Slytherin Beater #3
David Churchyard-Slytherin Keeper
Gemma Jones-Madam Pomfrey
Shirley Henderson-Moaning Myrtle
Edward Randell-Justin Finch-Fletchley
Sally Mortemore-Madam Irma Pince
Louis Doyle-Ernie MacMillan
Charlotte Skeoch-Hannah Abbott
Brendan Columbus-Boy in Study Hall 1
Robert Ayres-Boy in Study Hall 2
Alfred Burke-Professor Dippet
Leslie Phillips-The Sorting Hat (voice)
Helen Stuart-Millicent Bulstrode
Daisy Bates-Brunette Lady - Moving Picture
David Tysall-Count - Moving Picture
Christian Coulson-Tom Marvolo Riddle
Martin Bayfield-Young Rubeus Hagrid
Robert Hardy-Cornelius Fudge
Julian Glover-Aragog (voice)
Les Bubb-Reader