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), Anthony Boyle (Scorpius Malfoy), Cherrelle Skeete (Rose Granger-Weasley/Young Hermione), Esther Smith (Delphi Diggory), Annabel Baldwin (Moaning Myrtle/Lily Potter Sr.), Adam McNamara (u/s Hagrid/Sorting Hat), James Le Lacheur (Yann Fredericks), Barry McCarthy (Amos Diggory/Albus Dumbledore), Sandy McDade (Professor McGonagall), Jack North (u/s Cedric Diggory/James Potter Jr./James Potter Sr.), Joshua Wyatt (u/s Dudley Dursley/Karl Jenkins/Viktor Krum), Nuno Silva (Bane), Harrison Noble (Young Harry Potter), Phoebe Austen (Lily Potter Jr.), Andrew McDonald (u/s Station Master)