Prince Charles of Wales and Diana Spencer July 29, 1981
Price tag: nearly $5 million
At the time, the wedding of Princess Diana and Prince Charles was dubbed “the most expensive in history,” though in total the nuptials cost just $2 million ($4.7 million, adjusted for inflation). The largest check was written for security, which at $600,000 was twice the price paid for the two-week honeymoon aboard the royal yacht Britannia. Other big-ticket items included $40,000 for the five-foot-high cake, $100,000 for flowers and decorations, $100,000 for a pre-wedding reception, $10,000 for five bridesmaids’ dresses and, of course, $60,000 for Diana’s diamond and sapphire engagement ring that’s now embellishing Kate Middleton’s hand. The princess’ dress was a spectacle itself, with a 25-foot train that trailed behind her for the three-and-a-half minute walk down the aisle as some 750 million people watched from home.