Prince Harry and Meghan Markle will become the Duke and Duchess of Sussex after their wedding today, Kensington Palace has announced.
"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," the palace said.
"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 announcement came hours before the couple were due to exchange vows at St George's Chapel in Windsor on Saturday.
The couple's new titles mirror that of Harry's older brother William, second in line to the throne, and his wife, Kate, who were made Duke and Duchess of Cambridge on the day of their wedding in 2011.
Sussex, an English county south of London, is home to the city of Brighton, a Victorian seaside resort known for its culture and LGBT scene.
While William was made earl of the Scottish region Strathearn and baron of Northern Irish town Carrickfergus, Harry will become earl of the Scottish town of Dumbarton and Baron of Kilkeel, Northern Ireland.