Pippa Middleton Out With Graydon in London

Big London night out for the Vanity Fair massive

Pippa Middleton was out on the town last night, attending a Vanity Fair dinner to launch the Serpentine's new Sackler Gallery, with her new boss Graydon Carter.

Pippa looked pretty darned fabulous as she arrived at the London event in a feather-trimmed shift cocktail dress by British designer Matthew Williamson.

The dinner was co-hosted by Michael Bloomberg, launching his Bloomberg Philanthropies Mayors' Challenge.

Pippa and Graydon (Getty Images) (David M. Benett)

London mayor Boris Johnson praised the American attitude to philanthropy, saying, "In America, they believe that if you have made a lot of money you should do something for society," contrasting that with the British approach which consists of: "buying the biggest house they can, with the most colossal grouse moor."

Also in attendance at the dinner was Jemima Khan.