Happily attending an event she didn’t have to plan, Pippa Middleton arrived at the Vicomte A. VIP dinner held at the Brompton Club today in London, England on Thursday (December 13).

The Duchess of Cambridge’s party-planning sister looked classy in a black dress, green jacket, and green heels as she zipped past photographers.

Recently, the 29-year-old British beauty fired back against the criticism of her party-planning book. She writes in The Spectator, “I have been much teased for my book . . . But in my defence, let me say this: ‘Celebrate’ is meant to be a guide to party planning, and, as such, it has to cover the basics. If I were to write a cookery book, for instance, I would be compelled to say that, to make an omelette, you have to break at least one egg.”

As for her Holiday plans, she reveals, “The Middletons’ Christmas should be blissfully calm. We’re good at keeping each other’s spirits up. My father has developed this funny tradition of surprising us at some point by appearing in fancy dress. He buys a new costume every year and typically gets a bit carried away—a couple of Christmases ago, he appeared in an inflatable sumo outfit.”