Kate Middleton vacationing in the Carribbean sans Prince William

Even a princess needs a little R&R.

People Magazine has confirmed that the Duchess of Cambridge, Kate Middleton, is on vacation with her family. The whole family seems to be on the trip including her parents Michael and Carole, sister Pippa and brother James. However, it does not seem that

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Prince William is with them. He is said to be at RAF base in Anglesey, Wales.

British Airways passengers spotted the family in first class on a flight from London's Gatwick Airport to St. Lucia in the Caribbean Wednesday. It is presumed their final destination is Mustique, where William and Kate have vacationed several times before.

Kate Middleton turned 30 on Jan. 9 and her mother’s 57th birthday is at the end of this month.

The palace has not commented on Kate’s vacation.