Jessica Biel rocks timeless chic in an YSL suit. Monsieur Saint Laurent would be proud. From wikipedia:
"Created in 1966 by famous couturier Yves Saint Laurent, the Le Smoking tuxedo suit for women was the first of its kind to earn attention in the fashion world and in popular culture. It pioneered long, minimalist, androgynous styles for women, as well as the use of power suits and the pantsuit in modern-day society."
For more info on the Le Smoking look, check out this definition. Now if only she had slicked her hair back, she would have looked like Linda Evangelista!
photo via instyle