Kate Middleton and Prince William married in 2011, almost 10 years after they met at university.
The couple now have three children, Prince George, five, Princess Charlotte, three, and Louis, almost one.
When she married William, Kate became the Duchess of Cambridge, as William was made the Duke of Cambridge.
Wives of Dukes and Earls take the female version of their husband’s title.
Kate Middleton news: Will she keep her title if Prince William dies?
Kate is officially known as Her Royal Highness Catherine Duchess of Cambridge, but if Prince William were to die would she retain this title?
Royal titles are complex and old-fashioned things, and probably make little sense to the modern Briton.
However, the Royal Family still opt to use them.
In the past the old-fashioned issue of titles has caused some confusion when coming into play in modern situations, for example divorce.
Princess Diana was named Her Royal Highness The Princess of Wales on her wedding day, however, after her divorce from Prince Charles the Queen changed the laws about titles.
Originally she kept her title of Her Royal Highness The Princess of Wales, however, a 1996 letters patent from the Queen states women who divorce royal princes would be stripped of their HRH title.
Kate Middleton news: Will she keep her title if Prince William dies? (Image: GETTY)
Kate Middleton news: When she married William, Kate became the Duchess of Cambridge (Image: GETTY)
So Diana became Diana, Princess of Wales after her divorce, and Her Royal Highness The Duchess of York became Sarah, Duchess of York.
So what would happen to Kate Middleton’s title if Prince William died?
If Prince William were to pass away
