Princess Astrid of Belgium, Archduchess of Austria-Este (born 5 June 1962), is the second child and only daughter of King Albert II and Queen Paola, and younger sister to the current Belgian monarch, King Philippe. She is married to Prince Lorenz of Belgium, head of the Austria-Este branch of the House of Habsburg-Lorraine, and is fifth in line of succession to the Belgian throne.
Princess Astrid was born one day before her father's 28th birthday at the Château de Belvédère, near Laeken, and was named after her late paternal grandmother, Astrid of Sweden, the popular first wife of King Leopold III. Her godparents were her uncle Fabrizio, Prince Ruffo di Calabria-Santapau, 7th Duke di Guardia Lombarda, and her aunt Grand Duchess Joséphine-Charlotte of Luxembourg.
Princess Astrid married Archduke Lorenz of Austria-Este, subsequently head of the Archducal House of Austria-Este, on 22 September 1984 at Brussels. Lorenz is the eldest son of Robert, Archduke of Austria-Este (1915–1996), and his wife Princess Margherita of Savoy-Aosta (born in 1930). Her husband was also created Prince of Belgium by Royal Decree on 27 November 1995.