Jamie Parker (Harry Potter), Paul Thornley (Ron Weasley), Noma Dumezweni (Hermione Granger), Poppy Miller (Ginny Potter), Alex Price (Draco Malfoy), Sam Clemmett (Albus Severus Potter), James Le Lacheur (u/s Scorpius Malfoy), Cherrelle Skeete (Rose Granger-Weasley/Young Hermione), Esther Smith (Delphi Diggory), Jeremy Ang Jones (Craig Bowker Jr.), Annabel Baldwin (Moaning Myrtle/Lily Potter Sr.), Claudia Grant (Polly Chapman), Paul Bentall (Uncle Dursley/Severus Snape/Lord Voldemort), Chris Jarman (Hagrid/Sorting Hat), Joshua Wyatt (u/s Yann Fredericks), Helena Lymbery (Aunt Petunia/Trolley Witch/Dolores Umbridge), Barry McCarthy (Amos Diggory/Albus Dumbledore), Sandy McDade (Professor McGonagall), Tom Milligan (Cedric Diggory/James Potter Jr./James Potter Sr.), Jack North (Dudley Dursley/Karl Jenkins/Viktor Krum), Nuno Silva (Bane), Ben Roberts (Young Harry Potter), Phoebe Austen (Lily Potter Jr.), Adam McNamara (Station Master)