Le Petit Ducru de Ducru-Beaucaillou is a wine brand that serves as the "third" wine of the esteemed Château Ducru-Beaucaillou, a Second Growth estate in the Saint-Julien appellation of Bordeaux, France. The brand's name, which translates to "The Little Ducru of Ducru-Beaucaillou," clearly signifies its direct connection to its prestigious parent winery.

It is crafted to be an accessible introduction to the classic style of Château Ducru-Beaucaillou. This wine is made from grapes sourced from the same Saint-Julien vineyards as the main wine, often from younger vines or specific plots that do not make the final cut for the estate's Grand Vin or its second wine, La Croix de Ducru-Beaucaillou.

Le Petit Ducru is known for its elegant, balanced, and approachable character. It is a blend, typically of Cabernet Sauvignon and Merlot, that is designed for earlier drinking than the estate's more powerful wines, while still showcasing the high-quality winemaking and unique terroir of the property. The brand was introduced in recent years as a successor to the former Château Lalande-Borie, further expanding the estate's portfolio. It offers a glimpse into the quality and signature style of the Borie family, who have owned the estate since 1942.