Princess Charlotte could make history if Duchess Kate gives birth to a baby boy

Royal history could be made later this in month when the royal baby finally arrives.

Catherine, Duchess of Cambridge, is expecting her third baby in April 2018. While many have focused on what this means for her and her husband Prince William, few have noted what this means for their older children.

As reported by Inquisitr, royal history could be made if their third child happens to be a little boy.

At this point, it is still believed that the couple themselves are in the dark about the gender of their third baby. This is not unusual, as the couple didn't know the genders of either Prince George or Princess Charlotte before their births.

It is also against royal tradition to find out the gender before the baby is born, although it is not a rule that is strictly upheld within the family.

But if the couple has another boy, for the first time in history he won't overtake a female sibling in the line of succession.

This is due to the Succession to The Crown Act of 2013, declared shortly before the birth of Prince George, that changed the laws in the line of succession to allow older female siblings to hold their position even if a boy were born.

This means that Princess Charlotte will have the right to become Queen of England before any younger siblings, regardless of gender, a first for the British Monarchy.

The change in the laws affect all royals born after October 28, 2011. At the same time, laws preventing royals from holding the crown should they marry Roman Catholics were also removed.

Princess Charlotte is currently fourth in line to the throne, after her grandfather Prince Charles, father Prince William, and older brother, Prince George.

When her younger sibling is born this month, her uncle, Prince Harry, will move down a spot into sixth in line to the throne.

As with the births of Prince George and Princess Charlotte, bookies are having a field day predicting both the gender and possible names of the new royal baby.

Bets are even being taken on whether the little one might make an appearance on the Queen's birthday on April 21.