Suggestions by @lordtargaryen

Charlie Hunnam

as Daemon Targaryen in House of the Dragon

Polly Walker

as Rhaenys Targaryen in House of the Dragon

Thomas McDonell

as Sirius Black in The Marauders Era

Rudy Pankow

as Lucius Malfoy (Teen) in The Marauders Era

Lucas Jade Zumann

as Rodolphus Lestrange (Teen) in The Marauders Era

Lizzy Greene

as Amelia Bones (Teen) in The Marauders Era

Joshua Shea

as Ted Tonks (Teen) in The Marauders Era

Amybeth McNulty

as Molly Prewett (Teen) in The Marauders Era

Cory Gruter-Andrew

as Arthur Weasley (Teen) in The Marauders Era

Thomasin McKenzie

as Alice Longbottom (Teen) in The Marauders Era

Noah Schnapp

as Frank Longbottom (Teen) in The Marauders Era

Finn Wolfhard

as Severus Snape (Teen) in The Marauders Era

Lexi Jayde

as Andromeda Black (Teen) in The Marauders Era

Emily Alyn Lind

as Narcissa Black (Teen) in The Marauders Era

Millie Bobby Brown

as Marlene Mckinnon (Teen) in The Marauders Era

Mackenzie Foy

as Bellatrix Black (Teen) in The Marauders Era

Jaeden Martell

as Peter Pettigrew (Teen) in The Marauders Era

Louis Partridge

as Remus Lupin (Teen) in The Marauders Era

Joshua Bassett

as Sirius Black (Teen) in The Marauders Era

Sadie Sink

as Lily Evans (Teen) in The Marauders Era