Suggestions by @batboys4ever

Dane DeHaan

as Peter Pettigrew in Marauders Era

Aneurin Barnard

as Serverus Snape in Marauders Era

Timothée Chalamet

as Regulas Black in Marauders Era

Aaron Taylor-Johnson

as James Potter in Marauders Era

Andrew Garfield

as Remus Lupin in Marauders Era

Sophie Skelton

as Lily Evans in Marauders Era

Ben Barnes

as Sirius Black in Marauders Era

Sadie Sink

as Lily Evans in Marauders Era

Santiago Loker

as Cassian in A Court Of Thorns And Roses

Timothée Chalamet

as Regulas Black in Slytherin Gang

Scarlett Bryne

as Pansy Parkinson in Slytherin Gang

Christian Coulson

as Tom Riddle in Slytherin Gang

Christopher Convery

as Tom Riddle in Slytherin Gang

Louis Partridge

as Lorenzo Berkshire in Slytherin Gang

Lorenzo Zurzolo

as Lorenzo Berkshire in Slytherin Gang

Louis Cordice

as Blaise Zabini in Slytherin Gang

Benjamin Wadsworth

as Mattheo Riddle in Slytherin Gang

Tom Felton

as Draco Malfoy in Slytherin Gang

Lorenzo Zurzolo

as Theodore Nott in Slytherin Gang

Fion Whitehead

as Young Cassian in A Court Of Thorns And Roses