Harry: Perrie Edward

Draco: Emma Watson

Ron: Kim Kardashian

Fred: Scarlett Byrne

George: Britney Spears

Oliver: Ariana Grande

Neville: Selena Gomez

Cedric: Kristen Stewart

Seamus: Alisha Marie

The Marauders
James: Erika Costell

Sirius: Emma Stone

Remus: Demi Lovato

Severus: Jacqueline Osborne

Peter: Lele Pons