The small civil ceremony took place at a registry office with the bride and groom's parents and their sisters acting as witnesses. The mayor of Monaco, Georges Marsan, was also in attendance. Von Habsburg wore a white off-the-shoulder Carolina Herrera dress with a fascinator veil, while d'Ambrosio wore a navy suit with a light blue tie.
Von Habsburg is the daughter of Archduke Karl von Habsburg (the current head of the Austrian Imperial family House of Habsburg-Lorraine) and Baroness Francesca von Thyssen-Bornemisza. Her paternal great-grandparents, Charles I of Austria and Zita of Bourbon-Parma, were the last Emperor and Empress of Austria.