Kate Middleton and Prince William are celebrating 13 years of marriage in an unprecedented time for the whole royal family as the princess undergoes treatment following a cancer diagnosis.
The Princess of Wales donned a silver satin slip dress for Prince William's childhood friend Nicholas Van Cutsem's wedding in 2009 – see throwback photos.
The Princess of Wales is known for her chic sense of style and contemporary take on royal fashion, and her appearance changed significantly when it became clear she would one day be Queen
In the end it was the news we d been waiting for. On November 16, 2010, the Palace announced that Prince William and Catherine Middleton were to be married.