Suggestions by @veroctrl

Ritu Arya

as Sybill Trelawney in Marauders Era - The Lost Generation

Charlie Heaton

as Rufus Scrimgeour in Teachers Era

David Oyelowo

as Bertie Higgs in Teachers Era

Sacha Baron Cohen

as Tiberius Ogden in Teachers Era

Angus Imrie

as Ellard Abbot in Teachers Era

Martins Imhangbe

as Dirk Cresswell in Marauders Era - The Lost Generation

Dev Patel

as Ted Tonks in Marauders Era - The Lost Generation

Will Poulter

as Gildenroy Lockhart in Marauders Era - The Lost Generation

Jason Momoa

as Rodolphus Lestrange in Marauders Era - The Lost Generation

Joel Fry

as Mundungus Fletcher in Marauders Era - The Lost Generation

Keira Knightley

as Andromeda Tonks (nee Black) in Marauders Era - The Lost Generation

Harry Lloyd

as Lucius Malfoy in Marauders Era - The Lost Generation

Benny Emmanuel

as Benjy Fenwick in Marauders Era - The Lost Generation

Nina Sosanya

as Bertha Jorkins in Marauders Era - The Lost Generation

Luke Newton

as Caradoc Dearborn in Marauders Era - The Lost Generation

Ncuti Gatwa

as Deadalus Diggle in Marauders Era - The Lost Generation

Katie McGrath

as Bellatrix Lestrange in Marauders Era - The Lost Generation

Sarah Gadon

as Narcissa Malfoy (Nee Black) in Marauders Era - The Lost Generation

Awkwafina

as Emma Vanity in Marauders Era - The Lost Generation

Havana Rose Liu

as Emmline Vance in Marauders Era - The Lost Generation