Suggestions by @helenafreyahp

Ben Barnes

as Victoria Prince in Harry Potter Summer 1899 era

Ester Expósito

as Martha Bagshot (Young Martha Grindelwald) in Harry Potter Summer 1899 era

Emily Carey

as Kendra Evans (young Kendra Dumbledore) in Harry Potter Summer 1899 era

Millane Friesen

as Helena Grindelwald in Harry Potter Summer 1899 era

Jessica Chastain

as Honoria Dumbledore in Harry Potter Summer 1899 era

Rebecca Ferguson

as Batilda Bagshot in Harry Potter Summer 1899 era

Cate Blanchett

as Martha Grindelwald in Harry Potter Summer 1899 era

Charlie Hunnam

as Friedrich Grindelwald in Harry Potter Summer 1899 era

Ben Hardy

as Percival Dumbledore in Harry Potter Summer 1899 era

Olivia Cooke

as Kendra Dumbledore in Harry Potter Summer 1899 era

louis patridge

as Argus Filch in Harry Potter Summer 1899 era

Paul Ahrens

as Aberforth Dumbledore in Harry Potter Summer 1899 era

Elle Fanning

as Ariana Dumbledore in Harry Potter Summer 1899 era

Jamie Campbell Bower

as Gellert Grindelwald in Harry Potter Summer 1899 era

Toby Regbo

as Albus Dumbledore in Harry Potter Summer 1899 era

Elle Fanning

as Ariana Dumbledore in Albus Dumbledore