Last night right in the heat of NYC summer, Sienna and Savannah Miller debuted the Spring 2008 line for Twenty8Twelve. For some reason (all the blue and white, perhaps), the party looked downright refreshing. The sisters were the women of the hour, playing host to celebrity guests like Anne, whom the lighting made look almost translucent. Rachel Zoe was also in the house, no doubt talking up her fab new book which comes out this October. I wonder who would win between the Millers, the Olsens and the Cruzes in a battle of the sister design teams. The Cruzes are feistier, but the Miller girls may be scrappy. Obviously, Olsens for the win. Ha. Twenty8Twelve will be sold at Bergdorf's in New York, Neiman's in Los Angeles, and Holt Renfrew in Canada. Check out some pictures of their designs here.

To see a whole bunch of pictures of the party including Rachel Zoe, Agyness Deyn, Leigh Lezark and lots more just read more

Images include Sienna Miller, Savannah Miller, Anne Hathaway, Rachel Zoe, Agyness Deyn, Jeffrey Costello, Robert Tagliapietra, Leigh Lezark, Benjamin Cho, Meredith Melling-Burke, Alexis Bryan, Lily Donaldson, Caroline Winberg, Susan Carocktan and Max Minghella.