Dress du Jour: January Jones Wows in Prabal Gurung

January Jones Mad Men Ball - P 2015
AP Images

January Jones Mad Men Ball - P 2015

The actress nailed the dress code at the 'Mad Men' Black & Red Ball on Wednesday evening.

The Dress: A black strapless dress featuring beaded details and sheer paneling at the waist, paired with a beaded red crop top with sheer short sleeves from Prabal Gurung's pre-fall collection.

The Wearer: Mad Men's favorite blonde, January Jones.

Read more Dress du Jour: Christina Hendricks in Vivienne Westwood Couture

The Event: The Black & Red Ball held in celebration of Mad Men's final seven episodes at the Dorothy Chandler Pavilion in L.A.

Why We Dig: As much as we love to see Jones in her most psychedelic '70s attire as Betty Francis on Mad Men, it was refreshing to see the actress in a sleek, contemporary dress in a modern silhouette. The unexpected crop-top-over-dress ensemble shows off the actress' tiny waistline, and the black-and-red color combo — a literal take on the dress code — was stunning against Jones' copper-colored smoky eye, bronzed cheeks and nude lip.