10 Facts About Kate Middleton and Prince William's Baby Girl

Though the princess will be known as the "spare to the heir" — meaning her brother, Prince George — there is a chance she could become monarch. In several points in British history, second-born royal children have ascended to the throne. In 1910, George V became king after his older brother, Prince Albert Victor, died from the flu. And in 1936, Edward VIII abdicated and his younger brother George VI became king.