The Prince and Princess of Wales are celebrating their 13th wedding anniversary, and the occasion is "bittersweet," one royal expert told Fox News Digital.
Prince William and Kate Middleton married on April 29, 2011, at London’s Westminster Abbey.
"This is obviously the most bittersweet anniversary William and Kate have ever experienced," Christopher Andersen, author of "The King," told Fox News Digital. "Their marriage is stronger than ever, they have three beautiful children – and...