Billie Eilish as Celeste Natalina Everett
Holland Roden as Lilian Evans
Naomi Scott as Leanna Doxon
Ezra Miller as Sirius Orion Black
Braeden Lemasters as James Fleamont Potter
Charlie Rowe as Remus John Lupin
Tom Holland as Peter Pettigrew
Sydney Sweeney as Alice Fortescue
Alexa Demi as Dorcas Meadows