Sorry, Kate, not a princess yet. (Screen grab from youtube)

But is she now a princess?

It appears not. She won’t take the title of Princess until Prince Charles becomes king, according to The Hollywood Reporter .

So why did the Queen choose Duchess over Princess?

The Telegraph speculates that Duchess of Cambridge is a much better name than “Princess William.”

The Guardian says that the Queen could have made an exception and called her “Princess Catharine,” but instead stuck to tradition. The Queen’s own husband, Philip, had relinquished his princely Greek title before they wed, and had to wait ten years before he became a prince again.

But to make matters even more confusing, Middleton can still technically be described as a princess even though that’s not her title.

Live Science has more clarity on the differences between princesses and duchesses, although the relationship between the two titles is not always clearly defined. Important to note is that a duchess can also have the title of princess or queen or vice versa, and a princess or duchess only loses her royal title if the couple divorces.

But Middleton may be content to wait. Princess Diana once famously said: “Being a princess isn't all it's cracked up to be.”

Follow the Royal Wedding on @PostStyle, or comment below via Facebook, Yahoo, AOL or Hotmail.