Renault’s legacy endured Prohibition, when production continued under medicinal and religious exemptions. After the passing of longtime steward John D’Agostino, leadership fell to his sister Marie D’Agostino, who became one of the early female leaders of a nationally recognized wine brand. For decades, Marie guided Renault’s expansion, spreading its wines across the country. She is credited with the hiring of Johnny Carson as a spokesperson, a bold move that elevated Renault Champagne into America’s living rooms. Her artistry is still evident today: the historic wine glass collection housed in Renault’s Wine Glass Museum is a testament to her vision, as is the Archives Library Room, which began as her beautifully curated gift shop.

By the 1960s, Renault Champagne had become the largest producer in America, toasted on The Tonight Show with Johnny Carson and at President John F. Kennedy’s inauguration. Over time, the property expanded to include a hotel, restaurant, and golf course, cementing its role as both a cultural landmark and a place of gathering.