She has held the title for more than a decade after marrying Prince William in a lavish ceremony at Westminster Abbey in April 2011.
Since then, the mother-of-three has been known to the British public as a Duchess and has performed her duties in accordance with the high-ranking role.
But her husband, the Duke of Cambridge, is now second to the throne and big changes are coming.
It comes after rumors circulated in some royal circles that the Queen may appoint Prince Charles regent.
We shouldn’t be too comfortable with Kate’s title as she will receive not one but two new ones in the future, Kent Live reports.
Recent royal events such as the death of the late Prince Philip and Prince Charles’ preparation for the throne have made the public reflect on the future of the monarchy.
There have been 26 Princes of Wales in history, but Prince Charles was the oldest heir and Prince of Wales in history.
He was invested in a 1969 ceremony at Caernarfon Castle surrounded by all the force of royal pomp and ceremony.
When Prince Charles takes the throne from Queen Elizabeth, Prince William will become the Prince of Wales.
This in turn means Kate will change her title from Duchess of Cambridge to Princess of Wales.
This is the title once held by Prince William and Prince Harry’s mother, Diana, and it is the title refused by Camilla Duchess of Cornwall out of respect.
Other changes will also occur in the distant future.
As the role of monarch shifts from Queen to Prince Charles, it will ultimately return to Prince William.
William would then, of course, become known as King William and rule the nation.
From then on, it is likely that Kate will be referred to as Queen Catherine – Catherine being her full name.
Since Kate does not have royal blood herself, she will be a queen consort.
A ceremony is planned for this moment, although it will not be as grand as William’s coronation.
Regardless of Kate’s official role, it is unlikely to affect her relationship and her duties to the public in the years to come.