Grand Duke Henri was born on 16 April 1955 at Château de Betzdorf (Luxembourg), as the second child but first son of Grand Duke Jean and Grand Duchess Joséphine-Charlotte of Luxembourg.
In 1998, Grand Duke Henri was named his father’s Lieutenant-Representative before becoming Grand Duke himself on 7 October 2000.
Prince Sébastien was born in 1992 at the Maternité Grande-Duchesse Charlotte and is the youngest child of the present Grand Ducal Couple.
The prince attended primary school at St. George’s International School in Luxembourg, followed by studies in the UK at Sunningdale School and Ampleforth College before completing his international baccalaureate at the International School of Luxembourg.
Like his father, Grand Duke Henri (in 1975) and his older brother Grand Duke Héritier Guillaume (2002), Prince Sébastien has successfully completed (2016-2017) an officer training in the prestigious Royal Military Academy of Sandhurst (RMAS) in the United Kingdom.
The Prince was then sworn in as an officer of the Luxembourg Army in September 2017, in the presence of his parents and other family-members. Since then, Prince Sébastien is part of the Irish Guards, a regiment of the British Army in which his grandfather, Grand Duke Jean, served during the Second World War.
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