No riotous antics for Kate Middleton's sister Pippa as she celebrated the engagement of one of their pals on Thursday.
The party was for Virgin boss Richard Branson's daughter Holly, who will marry her shipbroker fiancé Fred Andrews on November 20.
And Pippa, pretty in a peach mini dress, looked as fresh-faced on leaving as on arrival.
Also on their best behaviour at the do were Princesses Beatrice and Eugenie.
Holly and her fiancé are invited to all three parts of the wedding celebrations in Westminster Abbey and Buckingham Palace.
She told the Mirror: "To me they're just two good friends and I'll be happy to be there watching my two good friends get married."
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