Daniel Radcliffe as Harry Potter

Rupert Grint as Ron Weasley

Emma Watson as Hermione Granger

Imelda Staunton as Dolores Umbridge

Helena Bonham Carter as Bellatrix Lestrange

Robbie Coltrane as Rubeus Hagrid

Gary Oldman as Sirius Black

Ralph Fiennes as Lord Voldemort

Michael Gambon as Albus Dumbledore

Alan Rickman as Severus Snape

Richard Griffiths as Vernon Dursley

Brendan Gleeson as Alastor "Mad-Eye" Moody

Jason Isaacs as Lucius Malfoy

Evanna Lynch as Luna Lovegood

Katie Leung as Cho Chang

Warwick Davis as Filius Flitwick

Fiona Shaw as Petunia Dursley

Maggie Smith as Minerva McGonagall

David Thewlis as Remus Lupin

Emma Thompson as Sybill Trelawney

Julie Walters as Molly Weasley

David Bradley as Argus Filch

Tom Felton as Draco Malfoy

Robert Hardy as Cornelius Fudge

George Harris as Kingsley Shacklebolt

Natalia Tena as Nymphadora Tonks

Mark Williams as Arthur Weasley

Harry Melling as Dudley Dursley

Jason Boyd as Piers

Richard Macklin as Malcolm

Kathryn Hunter as Arabella Figg

Miles Jupp as TV Weatherman

Jessica Hynes as Mafalda Hopkirk (voice)

Adrian Rawlins as James Potter

Geraldine Somerville as Lily Potter

Peter Cartwright as Elphias Doge

Brigitte Millar as Emmeline Vance

Timothy Bateson as Kreacher (voice)

James Phelps as Fred Weasley

Oliver Phelps as George Weasley

Bonnie Wright as Ginny Weasley

Jamie Wolpert as Newspaper Vendor

Nicholas Blane as Bob

Daisy Haggard as Lift (voice)

Chris Rankin as Percy Weasley

Sian Thomas as Amelia Bones

Jamie Waylett as Vincent Crabbe

Josh Herdman as Gregory Goyle

Matthew Lewis as Neville Longbottom

Ryan Nelson as Slightly Creepy Boy

William Melling as Nigel 2nd Year

Apple Brook as Wilhelmina Grubbly-Plank

Devon Murray as Seamus Finnigan

Alfred Enoch as Dean Thomas

Afshan Azad as Padma Patil

Shefali Chowdhury as Parvati Patil

Jim McManus as Barman

Nick Shirm as Somewhat Doubtful Boy

Sam Beazley as Everard

John Atterbury as Phineas

Arben Bajraktaraj as Azkaban Death Eater

Richard Leaf as Dawlish

Tony Maudsley as Grawp

Alec Hopkins as Young Severus Snape

Robbie Jarvis as Young James Potter

James Walters as Young Sirius Black

Charles Hughes as Young Peter Pettigrew

James Utechin as Young Remus Lupin

Jason Piper as Centaur

Michael Wildman as Centaur

Richard Cubison as Death Eater

Peter Best as Death Eater

Tav MacDougall as Death Eater

Richard Trinder as Death Eater

Nathan Clarke as Gryffindor Student (uncredited)

David Heyman as Healer in Portrait (uncredited)

Cliff Lanning as Edgar Bones (uncredited)

James Payton as Frank Longbottom (uncredited)

Christopher Rithin as Dennis (uncredited)

Lauren Shotton as Pansy Parkinson (uncredited)

Timothy Spall as Peter Pettigrew (uncredited)

Lisa Wood as Alice Longbottom (uncredited)

Saskia Strallen as Dumbledore's Army Member (uncredited)