The second oldest son of the Grand Ducal couple was born on 3 June 1984.

Prince Félix Léopold Marie Guillaume de Luxembourg is third in line of succession after his older brother Hereditary Grand Duke Guillaume and his son Prince Charles respectively. He is also the older brother of Prince Louis, Princesse Alexandra, and Prince Sébastien.

Prince Félix holds the Order of the Gold Lion of the House of Nassau.

Prince Féix and his wife Princesse Claire have two children, a girl and a boy. Daughter Amalia Gabriela Maria Teresa was born on 15 June 2014. Son Liam was born on 28 November 2016.