What Is Kate Middleton's Correct Title?
Since the royal wedding on April 29th, 2011, it was made clear that Catherine Middleton would be styled Her Royal Highness Catherine, Duchess of Cambridge. She was not to be referred to as "Princess Catherine," since she was not of royal blood. Despite this, some outlets decided to go ahead and refer to the Berkshire native as "Princess Kate."
Just like Diana and the Countess of Wessex, royal protocol dictates that Catherine is not entitled to a style preceding her first name.
"On marriage, Prince William retained the title Prince William of Wales and as the wife of a Royal Prince, The Duchess is entitled to use the name of her husband, Princess William of Wales," a royal source told me.
"It is important to note she is not Princess Catherine or Princess Kate though," the source made sure to point out.
This entitlement reflects her position within the royal family. As royal blogger Ella Kay pointed out, there is a difference between ranking and title.
"The couple chose to use these names/ titles in the same way as other members of the Royal Family have used the titles conferred upon them by the Queen on marriage," the source added.
The takeaway: Catherine is, in fact, a princess of the United Kingdom because, says the source, she is "Princess William of Wales."