Harry and Meghan got the honour hours before their wedding today the same way Prince William and Kate Middleton were given a royal dukedom on their wedding morning.
Prince Harry and Meghan Markle’s title means they will now be addressed as Their Royal Highnesses the Duke and Duchess of Sussex.
The Queen also conferred a Dukedom on Meghan Markle’s husband, Prince Henry of Wales.
His titles will be Duke of Sussex, Earl of Dumbarton and Baron Kilkeel.
Just as when Kate Middleton got married, Meghan officially also became a princess today – but not in her own right.
She will be HRH Princess Henry of Wales.
An official 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.”
There has never previously been a Duchess of Sussex. The first Duke of Sussex was an eccentric son of King George III and his two marriages were deemed illegal.
Earl of Dumbarton is a title that has strong military connections. The first to hold the title was George Douglas, a younger son of the first Marquess of Douglas, who was created Earl of Dumbarton in 1675.
A Scottish nobleman and soldier, George was given the title by Charles II in recognition of his military service.
On George’s death at St German-en-Laye in France, the title passed to his son, also called George, who became the second Earl of Dumbarton.
The title Earl of Dumbarton became extinct when the second earl died in 1749, meaning it has not been used in more than 260 years.
As Prince Harry becomes the third to hold the Scottish title Earl of Dumbarton, his wife Meghan Markle will become Countess of Dumbarton.
Baron of Kilkeel has never previously been granted as a royal title.