By InStyle Staff
Updated Sep 19, 2012 @ 5:37 pm
Credit: Johns PKI/Splash News

Allison Williams was a front-row fixture at New York Fashion Week, and we just had to pull her aside at Prabal Gurung's show to ask what she put on her pucker to achieve such a gorgeous coral color (a perfect match to the piping on her dress). "Julie Harris, makeup artist extraordinaire, is the architect behind this today," Williams told Her personal pro layered on NARS Velvet Matte Lip Pencil in Pop Life. Pick one up now for $24 at

Plus, shop more celebrity lipsticks we love!

— Lindzi Scharf