What Kate Middleton's title will be when Prince William becomes King

She’s already known as the Duchess of Cambridge and the Countess of Stratheran, but when Prince William takes over the throne from his father, Kate Middleton will have another title.

The 36-year-old, who married Prince William in 2011 and now has three adorable kids with the Duke, will most likely be known as Queen Catherine.

Royal historian Marlene Koenig, of the Royal Musings blog told Hello! that ‘the wife of the king is by tradition a queen’.

Speaking about why Prince Philip isn’t known as King Philip, Marlene claimed ‘the husband of a queen, in most monarchies, has to be created a title.’

Just like Jack Brooksbank, who won’t be given a royal title when he marries Princess Eugenie in October, Philip didn’t become king, as he didn’t share the same rank as his wife.

When Kate married Prince William in 2011, she was given the title of the Duchess of Cambridge by the Queen.

Kate Middleton also took on the title of the Princess of Wales, because women marrying into the royal family take their husband’s first name.

The reason we don’t call Kate ‘princess’ is because being a royal duke/duchess, is actually higher on the social ladder than being a mere prince/princess believe it or not.

“While Catherine is absolutely a princess, her correct title is ‘Her Royal Highness the Duchess of Cambridge,’” CNN royal expert Victoria Arbiter told Yahoo Style.

“She wasn’t born a blood princess, so she is not a princess in her own right. When she married William, she took on the rank of her husband, a royal prince. However, referring to her as ‘Princess Kate’ is simply incorrect.”

So why did everyone call Diana “Princess Di”? The answer comes back to Charles.

At the time he married Diana, he was already a prince twice; firstly because he was born one, and then because in 1969, he was made the Prince of Wales – which was the more important title of the two.

Therefore, just as Kate took on her husband’s more important title of Duke, Diana adopted Charles’ title of Prince.

Kate Middleton and Prince William are also known as the Earl and Countess of Strathearn in Scotland and the Baron and Baroness of Carrickfergus in Ireland.

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