She was the daughter of Izabela Lubomirska, one of the richest people in the Commonwealth and cousin of the king Stanislaus Augustus, and the Grand Marshal of the Crown Stanisław Lubomirski.

She was considered one of the most beautiful Polish women of her time, for which she was called "Giulietta la bella".

In 1785[1] in Wilanów, she married Jan Nepomucen Potocki, travel writer best known for his novel The Manuscript Found in Saragossa and for being the first person in Poland to fly on a hot-air balloon.

[2] Following the triumph of Russia over the Constitution and the accession of the king to the Targowica Confederation, Julia and her husband returned to France, where he had links with the Jacobins.

[4] Through her son Alfred Wojciech Potocki and his daughter the current royal family of Liechtenstein are her descendants.