The Orange-Nassau family attends the celebration of King's Day in Groningen. Besides King Willem-Alexander and Queen Máxima and their three daughters (Princesses Amalia, Alexia and Ariane) also the King's brother, Prince Constantijn and his wife Princess Laurentien attended. The children of Princess Margriet - the King's cousins - were also in attendance: Prince Maurits and Princess Marilene, Prince Bernhard and Princess Annette, Prince Pieter-Christiaan, Prince Floris and Princess Aimee.