Pictures of Zac Posen on America's Next Top Model

Lucky America's Next Top Model contestants are taking the runway tonight — and putting on Posen! That's right, the enviable cast gets styled up by Zac Posen, hitting the catwalk in the designer's Fall '10 collection. Click through to get a sneak peek of Zac on set, the models in action, and the gorgeous clothes. Then, be sure to watch Zac Posen take a turn at judge's table tonight!