Even at two years old Princess Charlotte proved herself a pro at Royal duties.
They both have official royal titles, as third and fourth in line to the throne.
But while Prince George's future children would also have HRH status, any children that Princess Charlotte has are unlikely to be princes or princesses.
According to the Daily Mail, an expert has revealedCharlotte's future offspring would not be automatically be given royal titles - because these are inherited through sons, not daughters.
This is the case with Princess Anne's children Zara Tindall and Peter Phillips, who do not have HRH status, while Prince Andrew's daughters, Princesses Beatrice and Eugenie, do.
Speaking to Town & Country, Lucy Hume, associate director of etiquette experts Debrett's, explained: "Royal titles are inherited through sons, so if Princess Charlotte has children they would not automatically inherit the titles HRH, Prince, or Princess."
Ms Hume explained: "The monarch may offer to bestow a royal title upon his or her daughter's children.
"For Peter and Zara Phillips, the Queen offered to give them a royal title when they were born, but Princess Anne and Captain Phillips opted to decline this offer."
While Charlotte's children will not automatically become princes or princesses, the young royal will not be overtaken in the line of succession - even if the Duke and Duchess of Cambridge have another boy.
This is because a law change in 2013 before the birth of George means that male members of the royal family are no longer given preference.
