Ron Weasley -- Rupert Grint
Hermione Granger -- Emma Watson
Prof. Albus Dumbledore -- Richard Harris
Prof. McGonagall -- Maggie Smith
Prof. Snape -- Alan Rickman
Prof. Quirrell -- Ian Hart
Draco Malfoy -- Tom Felton
Rubeus Hagrid -- Robbie Coltrane
Nearly-Headless Nick -- John Cleese
Prof. Flitwick --Warwick Davis
Madam Hooch -- Zoe Wannamaker
Oliver Wood -- Sean Biggerstaff
Percy Weasley -- Chris Rankin
Fred Weasley -- James Phelps
George Weasley -- Oliver Phelps
Angelina Johnson -- Danielle Tabor
Alicia Spinnet -- Leila Sutherland
Katie Bell -- Emily Dale
Aunt Petunia Dursley -- Fiona Shaw
Uncle Vernon Dursley -- Richard Griffiths
Dudley Dursley -- Harry Melling
Griphook -- Verne Troyer
The Grey Lady -- Nina Young
The Fat Friar -- Simon Fisher-Becker
The Bloody Baron -- Terence Baylor
Argus Filch -- David Bradley
Seamus Finnigan -- Devon Murray
Neville Longbottom -- Matthew Lewis
Dean Thomas -- Alfie Enoch
Mr. Ollivander -- John Hurt
Mrs. Weasley -- Julie Walters
Ginny Weasley -- Bonnie Wright
Lord Voldemort -- Richard Bremmer
The Fat Lady -- Elizabeth Spriggs
The Sorting Hat -- Leslie Phillips