- Alan Rickman - Severus Snape
- Richard Griffiths - Vernon Dursley
- Brendan Gleeson - Alastor "Mad-Eye" Moody
- Jason Isaacs - Lucius Malfoy
- Evanna Lynch - Luna Lovegood
- Katie Leung - Cho Chang
- Warwick Davis - Filius Flitwick
- Fiona Shaw - Petunia Dursley
- Maggie Smith - Minerva McGonagall
- David Thewlis - Remus Lupin
- Emma Thompson - Sybill Trelawney
- Julie Walters - Molly Weasley
- David Bradley - Argus Filch
- Tom Felton - Draco Malfoy
- Robert Hardy - Cornelius Fudge
- George Harris - Kingsley Shacklebolt
- Natalia Tena - Nymphadora Tonks
- Mark Williams - Arthur Weasley
- Harry Melling - Dudley Dursley
- Jason Boyd - Piers
- Richard Macklin - Malcolm
- Kathryn Hunter - Arabella Figg
- Miles Jupp - TV Weatherman
- Jessica Hynes - Mafalda Hopkirk (voice)
- Adrian Rawlins - James Potter
- Geraldine Somerville - Lily Potter
- Peter Cartwright - Elphias Doge
- Brigitte Millar - Emmeline Vance
- Timothy Bateson - Kreacher (voice)
- James Phelps - Fred Weasley
- Oliver Phelps - George Weasley
- Bonnie Wright - Ginny Weasley
- Jamie Wolpert - Newspaper Vendor
- Nicholas Blane - Bob
- Daisy Haggard - Lift (voice)
- Chris Rankin - Percy Weasley
- Sian Thomas - Amelia Bones
- Jamie Waylett - Vincent Crabbe
- Josh Herdman - Gregory Goyle
- Matthew Lewis - Neville Longbottom
- Ryan Nelson - Slightly Creepy Boy
- William Melling - Nigel 2nd Year
- Apple Brook - Wilhelmina Grubbly-Plank
- Devon Murray - Seamus Finnigan
- Alfred Enoch - Dean Thomas
- Afshan Azad - Padma Patil
- Shefali Chowdhury - Parvati Patil
- Jim McManus - Barman
- Nick Shirm - Somewhat Doubtful Boy
- Sam Beazley - Everard
- John Atterbury - Phineas
- Arben Bajraktaraj - Azkaban Death Eater
- Richard Leaf - Dawlish
- Tony Maudsley - Grawp
- Alec Hopkins - Young Severus Snape
- Robbie Jarvis - Young James Potter
- James Walters - Young Sirius Black
- Charles Hughes - Young Peter Pettigrew
- James Utechin - Young Remus Lupin
- Jason Piper - Centaur
- Michael Wildman - Centaur
- Richard Cubison - Death Eater
- Peter Best - Death Eater
- Tav MacDougall - Death Eater
- Richard Trinder - Death Eater
- Nathan Clarke - Gryffindor Student (uncredited)
- James Payton - Frank Longbottom (uncredited)
- Christopher Rithin - Dennis (uncredited)
- Lauren Shotton - Pansy Parkinson (uncredited)
- Timothy Spall - Peter Pettigrew (uncredited)
- Lisa Wood - Alice Longbottom (uncredited)
- Saskia Strallen - Dumbledore's Army Member (uncredited)
- Robert Pattinson - Cedric Diggory (archive footage)
- Cliff Lanning
- David Yates
- J.K. Rowling
- Simon Emanuel
- Fiona Weir
- David Heyman
- Nicholas Hooper
- James Boyle
- Andie Derrick
- Peter Burgis
- Andy Kennedy
- Peter Gleaves
Capítulo disponible en las siguientes plataformas:
