Jessica Biel Gaia RepossiLeelee Sobieski

Following an amazing pre-party on Wednesday, last night marked the 2013 Guggenheim International Gala made possible by Dior. Fashion-forward guests rose to the momentous occasion, donning head-turning Dior looks we couldn't get enough of. From Jessica Biel's feminine, color-block dress to Leelee Sobieski's decidedly ladylike ensemble, click through to see who made our best dressed list from Thursday evening's gala.

[All photos via BFA]