Principales:
- Daniel Radcliffe – Harry Potter
- Emma Watson – Hermione Granger
- Rupert Grint – Ron Weasley
Profesores y personal de Hogwarts:
4. Alan Rickman – Severus Snape
- Maggie Smith – Minerva McGonagall
- Robbie Coltrane – Rubeus Hagrid
- Michael Gambon – Albus Dumbledore (a partir de la tercera película)
- Richard Harris – Albus Dumbledore (en las dos primeras películas)
- David Bradley – Argus Filch
- Warwick Davis – Filius Flitwick
- Zoë Wanamaker – Madame Hooch (primera película)
- Jim Broadbent – Horace Slughorn
- Kenneth Branagh – Gilderoy Lockhart
- Miranda Richardson – Rita Skeeter
Familia Weasley:
15. Julie Walters – Molly Weasley
- Mark Williams – Arthur Weasley
- Bonnie Wright – Ginny Weasley
- James Phelps – Fred Weasley
- Oliver Phelps – George Weasley
- Chris Rankin – Percy Weasley
- Domhnall Gleeson – Bill Weasley
Otros estudiantes:
22. Tom Felton – Draco Malfoy
- Matthew Lewis – Neville Longbottom
- Evanna Lynch – Luna Lovegood
- Alfred Enoch – Dean Thomas
- Josh Herdman – Gregory Goyle
- Jamie Waylett – Vincent Crabbe
- Devon Murray – Seamus Finnigan
Mortífagos y seguidores de Voldemort:
29. Ralph Fiennes – Lord Voldemort
- Helena Bonham Carter – Bellatrix Lestrange
- Jason Isaacs – Lucius Malfoy
- Timothy Spall – Peter Pettigrew
- Dave Legeno – Fenrir Greyback
- Helen McCrory – Narcissa Malfoy
Orden del Fénix y otros personajes buenos:
35. Gary Oldman – Sirius Black
- David Thewlis – Remus Lupin
- Brendan Gleeson – Alastor “Ojo-Loco” Moody
- Emma Thompson – Sibyll Trelawney
- Geraldine Somerville – Lily Potter
- Adrian Rawlins – James Potter
- Tonks – Natalia Tena
- Kingsley Shacklebolt – George Harris
Otros personajes:
43. Richard Griffiths – Vernon Dursley
- Fiona Shaw – Petunia Dursley
- Harry Melling – Dudley Dursley
- John Hurt – Ollivander
- Robert Pattinson – Cedric Diggory
- Stanislav Yanevski – Viktor Krum
- Clémence Poésy – Fleur Delacour