Credit: Nick Harvey/

At the last charity event she attended, Pippa Middleton flashed her cleavage in a plunging red dress. And while she went for a more covered up look at a dinner in Richard, England on Thursday night, the sexy Brit managed to show off her famous figure in a form-fitting satin dress.

The Duchess of Cambridge's little sister chose a full-length, floral-print design with long sleeves by Project D. Middleton, 28, pulled her hair back into a loose updo and carried a small gold clutch.

She mingled with Sienna Miller at the high-profile party, which helped raise money for Too Many Women, an organization which fights breast cancer.