On Thursday, Queen Mathilde and Princess Eléonore attended a "Cassandre" opera performance. “Cassandre” is the first opera by Belgian composer Bernard Foccroulle.

Queen Mathilde wore her Natan top with black trousers, black pumps, and her A Bag With A Story clutch. She paired the outfit with her Christine Bekaert earrings and her Rolex watch.

Princess Eléonore wore an Indiee top (with thanks to RoyalFashionPolice) with black trousers and black boots.