Rachel Bilson, Taylor Swift and Celebrities at the Robert Cavalli Party at Paris Fashion Week

What a way to kickstart Paris Fashion Week! Celebs, models and the fashion pack flocked to celebrate designer Roberto Cavalli's 40th Anniversary Dinner held at the Ecole des Beaux-Arts in Paris. Cavalli fans Taylor Swift, Leona Lewis, Rachel Bilson and Leigh Lezark all turned up to honour the designer, as did models Karolina Kurkova, Heidi Klum and Natalia Vodianova.To commemorate the occasion, Cavalli has also released a book about his last 40 years in the fashion industry. Check out our gallery of the night's stunning celebs!