Happy Birthday, Kate. The Duchess of Cambridge may not technically be a princess, but if she has a daughter -- she will be. Queen Elizabeth II ruled today (Wednesday), if the royal baby is a girl, she will be given the "Princess" title, at birth, rather than "Lady", the Mirror reports. The announcement comes on the Duchess' 31st birthday.
In addition, new updates to the Letters Patent rule that all of the Duke and Duchess' children will be titled with "Her/His Royal Highness Prince/Princess" at their time of birth. Under the previous rules, only the first born son would be granted the "Prince" title. Any subsequent children would have been styled "Lady" or "Duke" until their grandfather, Prince Charles, took the throne. At that time, all of Kate and Wills' children would be given the HRH Prince/Princess title. But under the new amendments, all of the children, including any twins, a first-born daughter, or second-born son will be titled HRH.
The updates to the Letters Patent were signed on January 1, 2013, but were not made public until today.