| Robbie Coltrane | Rubeus Hagrid |
| Gary Oldman | Sirius Black |
| Alan Rickman | Severus Snape |
| Maggie Smith | Minerva McGonagall |
| Margery Mason | Food Trolley Lady |
| Eric Sykes | Frank Bryce |
| Jason Isaacs | Lucius Malfoy |
| Miranda Richardson | Rita Skeeter |
| Ralph Fiennes | Lord Voldemort |
| Michael Gambon | Albus Dumbledore |
| Warwick Davis | Filius Flitwick |
| Robert Hardy | Cornelius Fudge |
| Shirley Henderson | Moaning Myrtle |
| Brendan Gleeson | Professor Alastor 'MadEye' Moody |
| Daniel Radcliffe | Harry Potter |
| Rupert Grint | Ron Weasley |
| Emma Watson | Hermione Granger |
| Geraldine Somerville | Lily Potter |
| Adrian Rawlins | James Potter |
| Bonnie Wright | Ginny Weasley |
| James Phelps | Fred Weasley |
| Oliver Phelps | George Weasley |
| Timothy Spall | Wormtail (Peter Pettigrew) |
| Mark Williams | Arthur Weasley |
| Tom Felton | Draco Malfoy |
| Alex Palmer | Death Eater |
| Devon Murray | Seamus Finnigan |
| David Bradley | Argus Filch |
| Matthew Lewis | Neville Longbottom |
| Joshua Herdman | Gregory Goyle (as Josh Herdman) |
| Alfred Enoch | Dean Thomas (as Alfie Enoch) |
| Jamie Waylett | Vincent Crabbe |
| Su Elliot | Ministry Witch |
| David Tennant | Barty Crouch Junior |
| Jeff Rawle | Amos Diggory |
| Robert Pattinson | Cedric Diggory |
| Stanislav Ianevski | Viktor Krum |
| Roger Lloyd-Pack | Barty Crouch (as Roger Lloyd Pack) |
| Katie Leung | Cho Chang |
| Matthews Lewis | Neville Longbottom |
| William Melling | Nigel |
| Afshan Azad | Padma Patil |
| Frances de la Tour | Madame Olympe Maxime |
| Shefali Chowdhury | Parvati Patil |
| Angelica Mandy | Gabrielle Delacour |
| Clémence Poésy | Fleur Delacour |
| Predrag Bjelac | Igor Karkaroff (as Pedja Bjelac) |
| Tolga Safer | Karkaroff's Aide |
| Louis Doyle | Ernie MacMillan |
| Charlotte Skeoch | Hannah Abbott |
| Robert Wiltford | Photografer |
| Tiana Benjamin | Angelina Johnson |
| Henry Lloyd-Hughes | Roger Davies (as Henry Lloyd Hughes) |
| Jarvis Cocker | Band Lead Singer |
| Jonny Greenwood | Band Lead Guitar |
| Phil Selway | Band Drums (as Philip Selway) |
| Steve Mackey | Band Bass Guitar |
| Jason Buckle | Band Rhythm Guitar |
| Steve Claydon | Band Keyboards |
| Alan Watts | Assistant Judge |
| David Sterne | Ministry Wizard |
| Philip Rham | Death Eater |
| Olivia Higginbottom | Death Eater |
| Ashley Artus | Death Eater |
| Paschal Friel | Death Eater |
| Richard Rosson | Death Eater (as Rubber Ritchie) |
| Sheila Allen | Ministry Witch |
| Anne Lacy | Ministry Witch |
| Flip Webster | Ministry Witch |
| Christopher Whittingham | Ministry Wizard |
| Liam McKenna | Ministry Wizard |
| Graham Campbell | Ministry Wizard (as Campbell Graham) |
| Robert Wilfort | Photographer |
| Jack Bagley | Class Member/Ballroom Dancer (uncredited) |
| Jimmy Song | Clumsy Lead Violinist (uncredited) |
