Here are some other delish purple numbers from DVF.
Random story, I met Diane when she came for an appearance at Nordstrom a few years ago. I was standing there with one of my girlfriends feeling a bit shy, when she walked up to us and said "Hello, I'm Diane." and shook our hands. I was beyond ecstatic. She was so gorgeous and so lovely in person. And yes, I am a nerd and got her autograph. It is one of my prized possessions!
The Project Runway dress is available here.
The rest of the images from style.com