Damien Avery (u/s Harry Potter), Gyton Grantly (Ron Weasley), Paula Arundell (Hermione Granger), Lucy Goleby (Ginny Potter), Tom Wren (Draco Malfoy), Sean Rees-Wemyss (Albus Severus Potter), Louis Corbett (u/s Scorpius Malfoy), Manali Datar (Rose Granger-Weasley/Young Hermione), Madeleine Jones (Delphi Diggory), Slone Sudiro (Craig Bowker Jr.), Gillian Cosgriff (Moaning Myrtle/Lily Potter Sr.), Jessica Vickers (Polly Chapman), David Ross Paterson (Uncle Dursley/Severus Snape/Lord Voldemort), Soren Jensen (Hagrid/Sorting Hat), Connor Sweeney (Yann Fredericks), Hannah Waterman (Aunt Petunia/Trolley Witch/Dolores Umbridge), George Henare (Amos Diggory/Albus Dumbledore), Debra Lawrance (Professor McGonagall), David Simes (Cedric Diggory/James Potter Jr./James Potter Sr.), Simon Chandler (u/s Dudley Dursley/Karl Jenkins/Viktor Krum), Hayden Spencer (Station Master)