Prince Edward and Sophie Rhys-Jones were given brand new titles last month by King Charles ahead of his Coronation.
The royal couple, who married in 1999, are now the Duke and Duchess of Edinburgh, with Charles granting the wishes of the late Queen and Prince Philip by offering his younger brother the title on his 59th birthday.
The pair previously held the titles The Earl and Countess of Wessex, which was somewhat out of the ordinary for a royal couple in modern times.