Acteurs Principaux
- Harry Potter – Daniel Radcliffe
- Ron Weasley – Rupert Grint
- Hermione Granger – Emma Watson
Acteurs secondaires récurrents
Amis du trio
- Rubeus Hagrid – Robbie Coltrane
- Neville Londubat – Matthew Lewis
- Luna Lovegood – Evanna Lynch
Professeurs du trio
- Albus Dumbledore I – Richard Harris
- Albus Dumbledore II – Michael Gambon
- Remus Lupin – David Thewlis
- Minerva McGonagall – Maggie Smith
- Severus Rogue – Alan Rickman
Famille du trio
- Sirius Black – Gary Oldman
- Dudley Dursley – Harry Melling
- Petunia Dursley – Fiona Shaw
- Vernon Dursley – Richard Griffiths
- James Potter – Adrian Rawlins
- Lily Potter – Geraldine Somerville
- Arthur Weasley – Mark Williams
- Fred & George Weasley – James & Oliver Phelps
- Ginny Weasley – Bonnie Wright
- Molly Weasley – Julie Walters
- Percy Weasley – Chris Rankin
Ennemis du trio
- Drago Malefoy – Tom Felton
- Lord Voldemort – Ralph Fiennes
- Voldemort jeune – Hero Fiennes-Tiffin & Christian Coulson & Frank Dillane
Acteurs secondaires
Élèves de Poudlard
Gryffondor
Année de Harry Potter
- Dean Thomas – Alfred Enoch
- Seamus Finnigan – Devon Murray
- Lavande Brown – Jennifer Smith & Jessie Cave
- Parvati Patil – Sitara Shah & Shefali Chowdhury
Autres Années
- Colin Crivey – Hugh Mitchell
- Olivier Dubois – Sean Biggerstaff
- Katie Bell – Emily Dale & Georgina Leonidas
- Angelina Johnson – Danielle Tabor & Tiana Benjamin
- Alicia Spinnet – Leilah Sutherland & Rochelle Douglas
- Leanne – Isabella Laughland
- Lee Jordan – Luke Youngblood
- Cormac McLaggen – Freddie Stroma
- Romilda Vane – Anna Shaffer
- Nigel Wespurt – William Melling
Serpentard
Année de Harry Potter
- Vincent Crabbe – Jamie Waylett
- Gregory Goyle – Joshua Herdman
- Pansy Parkinson – Genevieve Gaunt & Scarlett Byrne
- Millicent Bulstrode – Helen Stuart
- Blaise Zabini – Louis Cordice
Autres Années
- Marcus Flint – Jamie Yeates
- Terence Higgs – Will Theakston
- Adrian Pucey – Scot Fearn
Serdaigle
Année de Harry Potter
- Padma Patil – Sharon Sandu & Afshan Azad
Autres Années
- Pénélope Deauclaire – Gemma Padley
- Cho Chang – Katie Leung
- Marcus Belby – Robert Knox
Poufsouffle
Année de Harry Potter
- Hannah Abbot – Charlotte Skeoch
- Susan Bones – Eleanor Columbus
- Justin Finch-Fletchley – Edward Randell
- Ernie Macmillan – Louis Doyle & Jamie Marks
Autres Années
- Cedric Diggory – Robert Pattinson
- Miles Bletchley – David Churchyard
- Zacharias Smith – Nick Shirm
Professeurs de Poudlard
- Rolanda Bibine – Zoë Wanamaker
- Charity Burbage – Carolyn Pickles
- Pomona Chourave – Miriam Margolyes
- Armando Dippet – Alfred Burke
- Firenze – Ray Fearon [Voix]
- Flitwick / Gripsec : Warwick Davis
- Wilhelmina Gobe-Planche – Apple Brook
- Gilderoy Lockhart – Kenneth Branagh
- Dolorès Ombrage – Imelda Staunton
- Quirinus Quirrell – Ian Hart
- Horace Slughorn – Jim Broadbent
- Sibylle Trelawney : Emma Thompson
Autres personnages de Poudlard
Humains
- Irma Pince – Sally Mortemore
- Poppy Pomfresh – Gemma Jones
- Argus Rusard – David Bradley
- Autres (fantômes / Créatures / Etc.)
- Le Baron Sanglant – Terence Bayler
- Sir Catogan – Paul Whitehouse
- Le Choixpeau Magique – Leslie Phillips[Voix]
- La Dame Grise – Kelly Macdonald
- La Grosse Dame – Dawn French
- Mimi Geignarde – Shirley Henderson
- Le Moine Gras – Simon Fisher-Becker
- Nick Quasi-Sans-Tête – John Cleese
- Phineas Nigellus Black – John Atterbury
- Peeves – Rik Mayall
L’Ordre du Phénix
- Dedalus Diggle – David Brett
- Elphias Doge – David Ryall
- Abelforth Dumbledore – Ciarán Hinds
- Arabella Figg – Kathryn Hunter
- Mondingus Fletcher – Andy Linden
- Alastor Maugrey – Brendan Gleeson
- Kingsley Shacklebolt – George Harris
- Nymphadora Tonks – Natalia Tena
- Emmeline Vance – Brigitte Millar
- Bill Weasley – Domhnall Gleeson
- Charlie Weasley – Alex Crockford
Mangemorts
- Regulus Black – Tom Moorcroft
- Alecto Carrow – Suzie Toase
- Amycus Carrow – Ralph Ineson
- Bartemius Croupton Jr. – David Tennant
- Antonin Dolohov – Arben Bajraktaraj
- Fenrir Greyback – Dave Legeno
- Bellatrix Lestrange – Helena Bonham Carter
- Walden Macnair – Peter Best
- Lucius Malefoy – Jason Isaacs
- Narcissa Malefoy – Helen McCrory
- Peter Pettigrow – Timothy Spall
- Thorfinn Rowle – Rod Hunt
- Scabior – Nick Moran
- Travers – Tav MacDougall
- Yaxley – Peter Mullan
Sorciers étrangers
- Fleur Delacour – Clémence Poésy
- Gabrielle Delacour – Angelica Mandy
- Gregorovitch – Rade Šerbedžija
- Gellert Grindelwald – Jamie Campbell Bower
- Igor Karkaroff – Predrag Bjelac
- Assistant de Karkaroff – Tolga Safer
- Viktor Krum – Stanislav Ianevski
- Olympe Maxime – Frances De la Tour
Autres Sorciers
- Mr Barjow – Edward Tudor-Pole
- Bozo, le photographe de Rita Skeeter – Robert Wilfort
- Amelia Bones – Sian Thomas
- Reg Cattermole – Steffan Rhodri
- Barty Croupton Sr. – Roger Lloyd-Pack
- Ernie Danlmur – Jimmy Gardner
- John Dawlish – Richard Leaf
- Amos Diggory – Jeff Rawle
- Ariana Dumbledore – Hebe Beardsall
- Femme de ménage au Chaudron Baveur – Abby Ford
- Cornelius Fudge – Robert Hardy
- Journaliste de la Gazette du Sorcier – Peter O’Farrell
- Xenophilius Lovegood – Rhys Ifans
- Mafalda Hopkirk – Sophie Thompson
- Tante Muriel – Matyelok Gibbs
- Mr Ollivander – John Hurt
- Stan Rocade – Lee Ingleby
- Madame Rosmerta – Julie Christie
- Albert Runcorn – David O’Hara
- Rufus Scrimgeour – Bill Nighy
- Rita Skeeter – Miranda Richardson
- Pius Thicknesse – Guy Henry
- Tom, le barman – Jim Tavaré
- Bathilda Tourdesac – Hazel Douglas
- Vendeur de journaux – Jamie Wolpert
Autres Moldus
- Frank Bryce – Eric Sykes
- Mme Cole – Amelda Brown
- Marjorie Dursley – Pam Ferris
- M. Granger – Ian Kelly & Tom Knight
- Mme Granger – Heather Bleasdale & Michelle Fairley
- Malcolm – Richard Macklin
- M. Mason – Jim Norton
- Mme Mason – Veronica Clifford
- Piers Polkiss – Jason Boyd
- Garde de sécurité à la gare de King’s Cross – Harry Taylor
- Météorologue – Miles Jupp
- Serveuse – Eva Alexander
Autres Créatures
- Aragog – Caméo
- Bane – Jason Piper
- Bogrod – Jon Key
- Dobby – Toby Jones [Voix]
- Firenze – Ray Fearon [Voix]
- Gobelin au guichet de Gringotts – Rusty Goffe
- Graup – Tony Maudsley
- Kreattur – Simon McBurney [Voix]
- Magorian – Michael Wildman
- Sanguini – Charlie Bennison
- Tête réduite – Lenny Henry [Voix]
Doubleurs VF
- Harry Potter – Kelyan Blanc
- Ron Weasley – Olivier Martret
- Hermione Granger – Manon Azem
- Albus Dumbledore – Marc Cassot
- Rubeus Hagrid – Patrick Messe & Achille Orsoni
- Severus Rogue – Claude Giraud
- Minerva McGonagall – Claudie Chantal & Mireille Delcroix
- Remus Lupin – Guillaume Lebon
- Alastor Maugrey – Patrick Bethune
- Dolores Ombrage – Solange Boulanger
- Horace Slughorn – Roger Carel & Jean-Claude Donda
- Gilderoy Lockhart – Renaud Marx
- Quirinus Quirrell – Vincent Violette
- Argus Rusard – Serge Lhorca & Jean Lescot
- Filius Flitwick – Eric Missoffe
- Sybille Trelawney – Frédérique Tirmont
- Madame Pomfresh – Denise Metmer
- Pomona Chourave – Nicole Favart
- Drago Malefoy – Dov Milsztajn
- Ginny Weasley – Léa François & Camille Donda & Margaux Laplace
- Neville Londubat – Romain Larue
- Luna Lovegood – Emilie Rault
- Fred et George Weasley – Guillaume Legier
- Cho Chang – Sasha Supera
- Seamus Finnigan – Alexandre Bouché & Thomas Sagols
- Dean Thomas – Yamine Gougmar & Pierre Lacombe
- Cedric Diggory – Julien Allouf
- Percy Weasley – Janieck Blanc
- Olivier Dubois – Tony Marot
- Colin Creevey – Maxime Nivet
- Voldemort – Philippe Peythieu (1) & Patrick Laplace
- Lucius Malefoy – Jérôme Keen
- Narcissa Malefoy – Laëtitia Lefebvre
- Peter Pettigrow – Michel Papineschi
- Bellatrix Lestrange – Marie Zidi
- Yaxley – Julien Kramer
- Barty Croupton Jr. – Stéphane Ronchewski
- Sirius Black – Gabriel Le Doze
- Arthur Weasley – Philippe Bellay
- Molly Weasley – Catherine Lafond
- Mondingus Fletcher – Paul Borne
- Fleur Delacour – Clémence Poésy
- Nymphadora Tonks – Audrey Lamy
- Xenophilius Lovegood – Emmanuel Karsen
- Cornelius Fudge – Philippe Dumat & Yves Barsacq
- Mimi Geignarde – Kelly Marot
- Barty Croupton Sr. – Hervé Jolly
- Kingsley Shacklebolt – Tola Koukoui
- Pius Thicknesse – Mathieu Buscatto
- Abelforth Dumbledore – Bernard Gabay
- Scabior – Remi Bichet
- Stan Rocade – Jean-François Pages
- Monsieur Ollivander – Marcel Guido
- Rita Skeeter – Charlotte Valandrey
- Lily Evans Potter – Laurence Bréheret
- Rufus Scrimgeour – Georges Claisse
- Nick Quasi-Sans-Tête – Frédéric Cerdal
- Helena Serdaigle – Agathe Schumacher
- Vernon Dursley – Michel Tugot-Doris
- Petunia Dursley – Danièle Hazan
- Dudley Dursley – Julien Bouanich
- Marjorie Dursley – Monique Thierry
- Elphias Doge – Pierre Hatet
- Gellert Grindelwald – Benoît Allemane
- Bogrod – Olivier Hémon
- Dobby (V.O. : Toby Jones) – Pierre Laurent
- Choixpeau Magique (V.O. : Leslie Phillips) – Gérard Rinaldi
- Aragog (V.O. : Julian Glover) – Vincent Grass