This photograph shows a wine cellar during the grape harvest at the Bollinger Champagne House's vineyard in Ay, northeastern France, on August 18, 2026. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)

This photograph shows a "Champagne Bollinger" sign on a building facade at the Bollinger Champagne House's vineyard in Ay, northeastern France, on August 18, 2026. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)

This photograph shows oak barrels in the wine cellar during the grape harvest at the Bollinger Champagne House's vineyard in Ay, northeastern France, on August 18, 2026. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)

This photograph shows vintage champagne bottles dating of 1830 from the first grape harvest of the Bollinger champagne house, created in 1829, during the grape harvest at the Bollinger Champagne House's vineyard in Ay, northeastern France, on August 18, 2026. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)

This photograph shows vintage champagne bottles dating from the founding of the Bollinger champagne house (1829) are photographed during the grape harvest at the Bollinger Champagne House's vineyard in Ay, northeastern France, on August 18, 2026. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)

This photograph shows bottles of champagne in the cellar during the grape harvest at the Bollinger Champagne House's vineyard in Ay, northeastern France, on August 18, 2026. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)

This photograph shows the coat of arms of the British Crown, reading « By appointment to HM King Charles III - Purveyors of champagne - Champagne Bollinger - Ay, France » at the Bollinger Champagne House's vineyard in Ay, northeastern France, on August 18, 2026. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)

This photograph shows oak barrels in the wine cellar during the grape harvest at the Bollinger Champagne House's vineyard in Ay, northeastern France, on August 18, 2026. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)