For those who can’t get enough of this and want to know Kate Middleton’s new official and future royal titles, I went through the exercise of researching her royal ascension. It might surprise you.
Catherine, Duchess of Cambridge, will actually be Her Royal Highness Princess William of Wales only after William becomes Prince of Wales once his father ascends to the throne or dies, whichever comes first. Then she will be Princess of Wales. She doesn’t have to wait for William to ascend to the throne to become Princess, as many have incorrectly stated.
When Charles becomes King she automatically becomes Duchess of Cornwall and Rothsay. When William ascends to the throne she will be Queen. Since an heir can only ascend to the throne through blood Prince Phillip has been forced to remain a lowly Prince to his Queen Elizabeth. He could not take the title of King because the throne supersedes the Queens. Not so for Catherine. William will be King and she will be his Queen.
What a dream come true for any young lady to marry a prince and eventually become his queen. This is what they mean by fairytale and happily ever after!