Harry Potter / Slytherin Students (voice)
Ron Weasley (voice)
Hermione Granger (voice)
Albus Dumbledore / Boris the Bewildered / Ministry Wizard (voice)
Lord Voldemort (voice)
Sirius Black / Staring Portrait (voice)
Dolores Umbridge / Miserable Female Gargoyle / Damara Dodderidge / Mrs. Black (voice)
Draco Malfoy (voice)
Professor Minerva McGonagall (voice) (as Eve Karpf)
Severus Snape / Argus Filch / Professor Basil Fronsac / Reginald Oddpick (voice)
Filius Flitwick (voice)
Professor Pomona Sprout / Elizabeth Burke (voice)
Hagrid / Barking Mad Male Gargoyle / GCR Male Portrait Four / Terminus Shanks (voice)
Bellatrix Lestrange (voice)
Lucius Malfoy / Lonley Male Gargoyle / Male Howler / Google Stump / Vindictus Viridian (voice)
Cornelius Fudge (voice)
Neville Longbottom (voice)
Luna Lovegood (voice)
Fred Weasley (voice)
George Weasley (voice)
Arthur Weasley / Sarcastic Male Gargoyle / GCR Male Portrait Three / Percival Pratt / Phineas Nigellus Black / Timothy the Timid (voice)
Ginny Weasley (voice)
Cho Chang (voice)
Padma Patil (voice)
Parvati Patil (voice)
Colin Creevey (voice)
Lee Jordan (voice)
Dean Thomas (voice) (as Alfie Enoch)
Angelina Johnson (voice)
Susan Bones (voice)
Zacharias Smith (voice)
Ernie Macmillan (voice)
Hannah Abbott (voice)
Terry Boot (voice)
Michael Corner (voice)
Anthony Goldstein (voice)
Moaning Myrtle (voice)
Remus Lupin (voice)
Nymphadora Tonks (voice) (as Nat Tena)
Nearly Headless Nick / Edward Rabnott / George von Rheticus (voice)
Dudley Dursley (voice)
Gang Member #1 / Ravenclaw Students (voice) (as Greg Chilingirian)
Grawp / Gang Member #2 (voice)
Professor Sybil Trelawney / Female Howler / Comedic Female Gargoyle / GCR Female Portrait One / The Fat Lady (voice)
Kreacher (voice)
Vincent Crabbe (voice)
Gregory Goyle (voice)
Sir Cadogan (voice)
Giffard Abbott / GCR Male Portrait Two (voice)
Quidditch Player / Slytherin Students (voice) (as Adrian Fergus-Fuller)
Shepherdess (voice)
Mermaid (voice)
Banner Narrator / Male Howler (voice)
Female Howler (voice)
Female Howler (voice) (as Sam Turner)
Male Howler (voice)
Gryffindor Students (voice)
Hufflepuff Students (voice)
Ravenclaw Students (voice)
Slytherin Students (voice)