A gyerekek:

Harry Potter      –     Daniel Radcliff

Hermione Granger – Emma Watson

Ron Weasley – Ruppert Grint

Draco Malfoy – Tom Felton

Felnőttek:

Albus Dumbledore – Michael Gambon

Prof. Perselus Piton – Alan Rickman

Prof. McGalagony – Maggie Smith

Hagrid - Robbie Coltrane

Lucius Malfoy – Jason Isaacs

Mordon – Brendan Gleeson

Voldemort – Ralph Fieness

Az új szereplők:

Imelda Staunton - Dolores Umbridge
George Harris - Kingsley Shacklebolt
Helen McCrory - Bellatrix Lestrange
Natalia Tena - Nymphadora Tonks
Kathryn Hunter - Mrs. Figg
Evanna Lynch - Luna Lovegood
Michael Wildman - Magorián
Robbie Jarvis - Fiatal James Potter