Harry Potter
Dudley Dursley
Piers
Malcolm
Mrs. Arabella Figg
TV Weatherman
Petunia Dursley
Vernon Dursley
Mafalda Hopkirk (voice) (as Jessica Stevenson)
James Potter
Lily Potter
Cedric Diggory (archive footage)
Lord Voldemort
Nymphadora Tonks
Alastor 'Mad-Eye' Moody
Kingsley Shacklebolt
Elphias Doge
Emmeline Vance (as Bridgette Millar)
Sirius Black
Arthur Weasley
Remus Lupin
Minerva McGonagall
Mrs. Weasley
Kreacher (voice)
Hermione Granger
Ron Weasley
Fred Weasley
George Weasley
Ginny Weasley
Newspaper Vendor
Bob
Lift (voice)
Cornelius Fudge
Lucius Malfoy
Percy Weasley
Albus Dumbledore
Dolores Umbridge
Amelia Bones
Draco Malfoy
Vincent Crabbe
Gregory Goyle
Cho Chang
Neville Longbottom
Luna Lovegood
Slightly Creepy Boy
Argus Filch
Seamus Finnigan
Nigel 2nd Year
Professor Grubbly-Plank
Severus Snape
Sybil Trelawney
Dean Thomas
Padma Patil
Parvati Patil
Filius Flitwick
Barman
Somewhat Doubtful Boy (Zacharias Smith)
Everard
Phineas
Bellatrix Lestrange
Rubeus Hagrid
Azkaban Death Eater
John Dawlish
Grawp
Young Severus Snape
Young James Potter (as Robert Jarvis)
Young Sirius Black
Young Peter Pettigrew
Young Remus Lupin
Centaur
Death Eater
Wizard on Flying Carpet (uncredited)
Ravenclaw Student (uncredited)
Commuter (uncredited)
Wizard (uncredited)
Train Porter (uncredited)
Healer in Portrait (uncredited)
Slytherin School Girl (uncredited)
Cho's Friend (uncredited)
Sally Anne Perks (uncredited)
Slytherin Student (uncredited)
He-Who-Must-Not-Be-Named (archive footage) (uncredited)
Pupil (uncredited)
Slytherin Girl (uncredited)
Rionach O'Neal (uncredited)
Gryffindor Student (uncredited)
Hogwarts Student (uncredited)
BMX Rider (uncredited)
Ministry of Magic's Panel Member (uncredited)
Hogwarts' Student (uncredited)
Ministry of Magic Panel Member (uncredited)
Student (uncredited)
Tonks (uncredited)
Witch (uncredited)
Muggle (uncredited)
Ministry of Magic Goblin (uncredited)
Wizard #23 (uncredited)
Wizard Teacher (uncredited)
Girl (uncredited)
Schoolgirl (uncredited)
School Student (uncredited)
Talking Prophecy (uncredited)
Cassius Warrington (uncredited)
Choir Member (uncredited)
Ministry of Magic Wizard (uncredited)
Edgar Bones (uncredited)
Hufflepuff Student (uncredited)
Gryffindor Student in Dumbledores Army (uncredited)
Ravenclaw Student in Dumbledore's Army (uncredited)
Wizard #19 (uncredited)
Dumbledore's Army Student (uncredited)
Extra (uncredited)
Frank Longbottom (uncredited)
Dumbledore's Army Member (uncredited)
Wizard Teacher Camelia (uncredited)
Dudley's Gang Member (uncredited)
Pansy Parkinson (uncredited)
Peter Pettigrew (uncredited)
Hogwarts Teacher (uncredited)
Cardinal (uncredited)
Baby Harry Potter (archive footage) (uncredited)
Dumbledore's Army Member / Gryffindor Pupil (uncredited)
Classroom Pupil (uncredited)