Suggestions by @mgno_vr

Jimmi Simpson

as Charlie Weasley in Harry Potter HBO Max

Dan Stevens

as Ronan in Harry Potter HBO Max

Tony Robinson

as Argus FIlch in Harry Potter HBO Max

Finn Wolfhard

as Tom Riddle in Harry Potter HBO Max

Tom Hardy

as Fenrir Greyback in Harry Potter HBO Max

Cillian Murphy

as Lord Voldemort in Harry Potter HBO Max

Michael Fassbender

as Alastor 'Mad Eye' Moody in Harry Potter HBO Max

Nick Frost

as Rubeus Hagrid in Harry Potter HBO Max

Stephen Fry

as Horace Slughorn in Harry Potter HBO Max

Carey Mulligan

as Alice Longbottom in Harry Potter HBO Max

Tom Sturridge

as Frank Longbottom in Harry Potter HBO Max

Anya Taylor-Joy

as Rita Skeeter in Harry Potter HBO Max

Tom Holland

as Oliver Wood in Harry Potter HBO Max

Ewan McGregor

as Kingsley Shacklebolt in Harry Potter HBO Max

James McAvoy

as Firenze in Harry Potter HBO Max

Sam Claflin

as Gilderoy Lockhart in Harry Potter HBO Max

Stephen Graham

as Mundungus Fletcher in Harry Potter HBO Max

Joanna Page

as Molly Weasley in Harry Potter HBO Max

Richard Madden

as James Potter in Harry Potter HBO Max

Dane DeHaan

as Peter Pettigrew in Harry Potter HBO Max