christmas photo princess diana black dress Princess Diana in Valentino - Hong Kong Gala @ Barbican, London

So, what shoes are appropriate for business casual?

The top section displays dresses inspired by Disney Princesses, including Aurora, Bell, Snow White, Cinderella, and Ariel

Large U-Neck with Contrast Straps: A flattering wide U-neckline accented with bold white contrast straps adds a fresh, sporty touch to the rich deep green hue, while offering full freedom of movement for your arms and shoulders

Recycled Polyester Wrap Dress + Ganni dress with contrast stitching

The King greeting guests. More about the event from The Telegraph. [Prince] Albert II and Princess Charlene of Monaco, Queen Letizia of Spain, and Mary, Crown Princess of Denmark, were among the European royals who descended on the Palace for the event