Prince Charles and Princess Diana only have two children together. But royal fans are wondering what would have happened if they have a third child and it’s a girl.

On the online forum site Quora, royal fan Chris Smith explained that the Prince and Princess of Wales’ daughter, assuming that she is their legitimate child, will be styled as HRH Princess xxx of Wales.

When the royal couple’s daughter ties the knot, she will be known as HRH Princess xxx, Mrs. John Smith. However, her title will be different if she is married to a royal or someone who also has an official title.

Dafydd Rowlands, a monarchist, and royal history buff, also gave a similar answer.

“Any daughter of Charles and Diana, so long as she was born after the wedding but before the divorce, would have been a Princess of the United Kingdom and Had the style of Her Royal Highness. Whilst Charles remained heir to the throne she would have been known as Her Royal Highness Princess [First name] of Wales. On Charles accession to the throne, she would have become: Her Royal Highness The Princess [First name],” he said.

And when Princess Anne dies, Rowlands said that there is a huge possibility that Prince Charles and Princess Anne’s daughter will inherit the Princess Royal title.

But Eileen Wood, a self-employed individual, gave a sarcastic answer to the question. She said that Prince Charles and Princess Diana’s daughter will be known as “HRH Princess Miracle-Because-The-Marriage-Was-Over-By-Then.”

Prince Charles and Princess Diana’s marriage already fell apart shortly after the latter became pregnant with Prince Harry. The royal couple started to get into more fights especially after the heir to the throne made a stark comment about wanting his second child to be a girl.

Fifteen years after they tied the knot at St. Paul’s Cathedral, Prince Charles and Princess Diana divorced. And one year later, the Princess of Wales passed away.

Prince Charles and Princess Diana
Prince Charles and Princess Diana are pictured at an official event during their first royal Australian tour 1983 in Newcastle, Australia. Patrick Riviere/Getty Images