Gideon Turner (u/s Harry Potter), Thomas Aldridge (Ron Weasley), Rakie Ayola (Hermione Granger), Emma Lowndes (Ginny Potter), James Howard (Draco Malfoy), Theo Ancient (Albus Severus Potter), Samuel Blenkin (Scorpius Malfoy), Helen Aluko (Rose Granger-Weasley/Young Hermione), April Hughes (u/s Delphi Diggory), Sarah Miele (u/s Moaning Myrtle/Lily Potter Sr.), Leah Haile (u/s Polly Chapman), Ged Simmons (u/s Uncle Dursley/Severus Snape/Lord Voldemort), Harry Rundle (Yann Fredericks), Elizabeth Hill (Aunt Petunia/Trolley Witch/Dolores Umbridge), Barry McCarthy (Amos Diggory/Albus Dumbledore), Sandy McDade (Professor McGonagall), Rupert Henderson (Cedric Diggory/James Potter Jr./James Potter Sr.), Tom Mackley (Dudley Dursley/Karl Jenkins/Viktor Krum), Nuno Silva (Bane), Martin Johnston (Station Master)