Estimated net worth: £1.4 million She's called Binky.
Do you really need any more proof of her poshness than that?
Though, she does like to fly her dogs over from the States, so that's pretty posh.
That beats just going to the same school as Kate Middleton, right?
The former broker and flared-nostrilled wonder has since concentrated on his music, which has probably netted him some dosh in the songwriting stakes.
While he hasn't set the charts alight, he has completed a sold-out UK tour and has worked in Nashville and with British songwriters such as Sam Mc Carthy and KATYA.
As with her sister, her entrepreneur father Clive owns The Phene pub in Chelsea, and has also founded various restaurant chains, including Tup Inns, City Pub Company, and the Capital Pub Company.
Give it a few years and the mini-Watson may rise the ranks. The Binky rule (see below) might seem to be in play here: anyone called Caggie has to be posh.