Each year, 16 April delivers two reasons to celebrate: it's the birthday both of Grand Duke Henri and of prince Sébastien.

Grand Duke Henri is turning 64 this year!

He was born on 16 April 1955 at Betzdorf castle. Grand Duke Henri is the eldest son of former Grand Duke Jean and Grand Duchess Joséphine-Charlotte (1927-2005). Henri Albert Gabriel Félix Marie Guillaume of Luxembourg is Grand Duke of the Grand Duchy since 7 October 2000.

For a more complete biography of Grand Duke Henri, have a look at part 4 of our very own royals series. 

The second birthday boy is the the fifth and youngest child of Grand Duke Henri and Grand Duchess Maria Teresa: prince Sébastien. He's turning 27 this year. He was born on 16 April 1992 at the Grand Duchess Charlotte Maternity Hospital in Luxembourg.

You can find an in-depth article on prince Sébastien here.

Happy birthday!