Prince Félix Léopold Marie Guillaume de Luxembourg, second child to Grand Duke Henri and his wife Maria Teresa, was born on 3 June 1984.
The Prince, who manages the Château les Crostes vineyard in Lorgues in the south of France alongside his wife, is also involved in the childrenswear brand "Young Empire", launched with friends in 2016.
He and his family recently modelled for the brand.
Prince Félix married Princess Claire on 21 September 2013.
The couple live in Germany with their two children, Princess Amalia Gabriela Maria Teresa and Prince Liam Henri Hartmut.