Little Princess Charlotte may be only two years old, but she just made a huge name for herself in the Royal history books. She is the first princess EVER in the British Monarchy to retain her position in the line of succession - even though her newest sibling turned out to be a boy.
In these modern times, you might be thinking, "What's the big deal?" But until very recently, male heirs always had priority over females, no matter their birth order.
In fact, the only reason Queen Elizabeth ascended to the Throne upon her father's death in 1952 is because she had no brothers. Since she was the older of the two daughters of King George VI, she was first in line and assumed the role of Sovereign.
Her sister Margaret instantly moved down two spots because Prince Charles and Princess Anne were already born and, being the offspring of the new Monarch, were at the top of the new line of succession.
With Andrew's and Edward's arrivals, Princess Anne took her place in line behind her younger brothers.
Because of a major change in the law, the offspring of the heir to the throne will now retain their positions in the line of succession corresponding to their actual birth order.
"In October 2011, the heads of government of all 16 realms [of the Commonwealth] unanimously agreed to proposed changes to the royal succession laws that would see the order of succession for people born after October 28, 2011, governed by absolute primogeniture.
"This is when succession passes to someone’s children according to their birth order, regardless of gender."
That means even though Princess Charlotte just gained a new little brother she will retain her position as fourth in line to the Throne. And that's a pretty big deal for such a little girl!