Camilla was seen wearing a silver brooch and a diamond bracelet.
Fan and Instagram user andsopenny said: “Camilla looks so gorgeous!”
Kate also looked stunning in a glittering gold dress.
The Duchess’ gown, the ‘Cape Effect Sequinned Dress’ is by designer Jenny Packham.
The dress, which is already sold out, cost £3893 but was reduced to £1168.
The Duchess combined her sparkly outfit with £290 Onitaa earrings.
She finished the look with gold heels from Aquazzura.
The Duchess styled her hair in an elegant updo.
Instagram user Rosana Caporuso commented: “Wow Camilla!”
Another fan, Vero Morillo, said: “Duchess Camilla looks so beautiful.
“The future Queen nailed it today.”
User Aquiles Duarte commented: So elegant.”