Lefèvre-Utile, better known worldwide by the initials LU, is a French manufacturer brand of biscuits, emblematic of the city of Nantes. The brand is now part of US confectionery company Mondelēz International since 2012, after splitting of its previous owner Kraft Foods Inc., which had acquired it as part of its acquisition from Groupe Danone in 2007. The Petit-Beurre biscuit remains the flagship product alongside the Ladyfinger, Champagne, Petit four, Prince de LU, Pim's, Paille d'Or, etc.

Nantes is a city in Loire-Atlantique of France on the Loire, 50 km (31 mi) from the Atlantic coast. The city is the sixth largest in France, with a population of 320,732 in Nantes proper and a metropolitan area of nearly 1 million inhabitants (2020). With Saint-Nazaire, a seaport on the Loire estuary, Nantes forms one of the main north-western French metropolitan agglomerations.