Suggestions by @fil_latulippe

Benedict Cumberbatch

as Lord Voldemort in HBO Harry Potter

Xochitl Gomez

as Nimphedora Tonks in HBO Harry Potter

Jessica Gunning

as Dolores Umbridge in HBO Harry Potter

Jamie Dornan

as Mad-Eye Moody in HBO Harry Potter

Robin Lord Taylor

as Peter Pettigrew in HBO Harry Potter

Leo Woodall

as Remus Lupin in HBO Harry Potter

Dev Patel

as Sirius Black in HBO Harry Potter

Karen Gillan

as Belatrix Lestrange in HBO Harry Potter

Lily James

as Narcissa Malfoy in HBO Harry Potter

LaKeith Stanfield

as Kingsley Shackelboat in HBO Harry Potter

Domhnall Gleeson

as Arthur Weasley in HBO Harry Potter

Paul Walter Hauser

as Vernon Dursley in HBO Harry Potter

Harris Dickinson

as Severus Snape in HBO Harry Potter

Jeffrey Wright

as Albus Dumbeldore in HBO Harry Potter