Alex Lawther as Amberson

Jonah Hauer-King as Winchester

Pauline Étienne as Agnes

Denis Ménochet as Babinot

Joshua McGuire as Huggins

Nicholas Rowe as Headmaster

Nicholas Agnew as Jonty

Giles Malcolm as Audley

David Gordon-Dixon as Scheppy

Archie Merry as Hood

Jack Cooper Stimpson as Birtles

Eros Vlahos as Johnson

Robbie Fraser as Vickers

Paul Cawley as Tuppy

Noah Stratton-Twine as School Boy

Jon Wennington as VIP Guest (uncredited)