Watch: Why aren't Duchess Meghan and Duchess Kate referred to as princesses?

Meghan Markle has just entered the royal fold after saying "I do" to Prince Harry at their spectacular royal wedding on May 19, while Duchess Kate exchanged vows with Prince William back in 2011. Though the two come from different beginnings, they have one thing in common: they are both married to Princes and yet their titles are that of Duchesses. While Harry's mom, Diana, and his two cousins, Beatrice and Eugenie, are all referred to as Princesses (officially or not!), many are wondering why Meghan and Kate haven't been bestowed the title. Watch below to find out why!

As the newly minted Duchess of Sussex, Meghan has officially been added to the Royal Family's website. On her wedding day, the former actress and her husband were granted their titles by Her Majesty. A statement from Kensington Palace read: "The Queen has today been pleased to confer a Dukedom on Prince Henry of Wales. His titles will be Duke of Sussex, Earl of Dumbarton and Baron Kilkeel. Prince Harry thus becomes His Royal Highness The Duke of Sussex, and Ms. Meghan Markle on marriage will become Her Royal Highness The Duchess of Sussex."

The same was done for the Duchess of Cambridge when she and Prince William became husband and wife, and this is the title that the two women use in their daily life. Where their occupations are concerned the royal sisters-in-law are formally referred to as "Princess of the United Kingdom" - a label Kate has used most notably on her children's birth certificates.

Though they're technically both princesses, Kate and Meghan go by the title Duchess. Photo: © Getty Images

Meghan and Kate are also princesses by virtue of marrying princes, but since they aren't born royal they take on the titles of their husbands: Princess William of Wales and Princess Henry of Wales. They will never be referred to as Princess Meghan or Princess Kate, unlike their late mother-in-law Princess Diana - though the 'People's Princess' should never have been referred to this way either. She was technically Diana, Princess of Wales.

But the mother of three and her new royal sister can rest assured that being a Duchess is the highest rank in the British peerage system - and sometimes considered even more prestigious than being born into a princess title.

Don't miss a beat with HELLO! Canada's Daily Hits newsletter, your daily dose of royal and celebrity news, fashion, weddings and more. CLICK HERE to sign up for free!