The online retailer is encouraging visitors to its site to declare undying love for their significant other in a public group on the web page.
Anyone who does so is in with a chance of winning a trip to Venice.
The competition will be judged by Prosecco winemaker Alessandro Botter.
He said: “Hello my friends. I look forward to reading all your messages and picking the winners. Pour your heart into your entry and declare your deep love to your sweetheart.”
The competition closes at midnight on February 14 and a winner will be picked on February 15.
To declare your undying love, visit nakedwines.com/getslushy