Hereditary Grand Duchess Stephanie of Luxembourg celebrates her 38th birthday today. Stephanie (Countess Stéphanie de Lannoy) was born on February 18, 1984 in Ronse in east Flanders region of Belgium. She is the youngest of the eight children of Count de Lannoy and Countess de Lannoy and grew up at the Anvaing family estate in the Belgian Hainaut region.