Her wedding to Prince Charles, now King Charles

Princess Diana married Prince Charles on 29 July 1981 at St Paul's Cathedral in London. Their wedding day was declared a public holiday in Britain, with approximately 600,000 spectators lining the streets of London to catch a glimpse of the couple. An estimated 750 million people across 74 countries tuned in to watch the ceremony, making it one of the most-watched royal weddings in history.