John Lithgow

as Albus Dumbledore

Janet McTeer

as Minerva McGonagall

Paapa Essiedu

as Severus Snape

Nick Frost

as Rubeus Hagrid

Paul Whitehouse

as Argus Filch

Dominic McLaughlin

as Harry Potter

Arabella Stanton

as Hermione Granger

Alastair Stout

as Ron Weasley