Red Carpet Arrivals at the 2010 Costume Institute Ball

M.I.A, Alexander Wang, Zoe Kravitz

After last year's "Model as Muse" parade of teeny tiny minis, long dresses are ruling the red carpet for the 2010 "American Woman"-themed Costume Institute ball. Anna Wintour in Chanel Haute Couture, Diane Kruger in Calvin Klein, Bee Shaffer in Balenciaga, Kate Bosworth in Valentino Haute Couture, Oprah Winfrey in custom Oscar de la Renta, and Emma Watson in Burberry—all opted for floor-length gowns. The few notable exceptions were Blake Lively in a barely there Marchesa, Hilary Rhoda in red and black Prabal Gurung, Gisele Bundchen in fringed Alexander Wang, and Carey Mulligan in purple Miu Miu. Click below for images straight from the red carpet at the Met.

Source: Getty/WireImage