James O'Connell (u/s Harry Potter), Gyton Grantly (Ron Weasley), Paula Arundell (Hermione Granger), Lucy Goleby (Ginny Potter), John Shearman (u/s Draco Malfoy), Sean Rees-Wemyss (Albus Potter), William Mckenna (Scorpius Malfoy), Kirsty Marillier (u/s Rose Granger-Weasley/Young Hermione), Madeleine Jones (Delphi Diggory), Louis Corbett (u/s Craig Bowker Jr.), Gillian Cosgriff (Moaning Myrtle/Lily Potter Sr.), Jessica Vickers (Polly Chapman), David Ross Paterson (Uncle Dursley/Severus Snape/Lord Voldemort), Connor Sweeney (Yann Fredericks), Hannah Waterman (Aunt Petunia/Trolley Witch/Dolores Umbridge), Hamish Johnston (Dudley Dursley/Karl Jenkins/Viktor Krum)