Guest Stars Jack Archer as Count of Provence Oscar Lesage as Duke of Chartres Crystal Shepherd-Cross as Adelaïde de France Nathan Willcocks as Comte de Mercy-Argenteau Caroline Piette as Victoire de France Jasmine Blackborow as Princess of Lamballe Laura Benson as Madame de Noailles Gaia Weiss as Madame du Barry Nathaniel Spender as Julie Gérard Watkins as Duc de Choiseul Benoît Maréchal as French Dancing Master