Louis Robert Paul Ducruet was born in Monaco on 26 November1992, the son of Princess Stéphanie of Monaco and Daniel Ducruet, a former Palace bodyguard.
His parents were subsequently married in a civil ceremony on July 1, 1995.
He has a sister Pauline born 1994, a half-brother Michel from a relationship his father previously had with Martine Malbouvier , and a half-sister Camille as a result of his mother's relationship with Jean Raymond Gottlieb.
Although he holds no title, he is a grandson of Prince Rainier III and is currently 7th in the line of succession to the Monegasque throne.