Since her days predicting the weather in "Mean Girls," Amanda Seyfried has grown up right before our eyes. Sure, she's still wide-eyed and kooky (and totally porcelain skinned), but without a doubt, Seyfried's style has evolved.

Case in point: the outfit she wore to the U.S. Open Tennis Championship opening night gala. Of course, when you put tennis and gala in the same sentence, you expect some serious class. But when we spotted Seyfried's ensemble, we were particularly smitten by her blend of classic, vintage and modern pieces, creating a look that normal women like us could easily wear.

So we decided to go right ahead and recreate it. Click through for the pieces you need to copy Seyfried's versatile look -- perfect for the office, a weekend soirée, a wedding and beyond.

To steal Seyfried's style, first choose a black-and-white dress with a Peter Pan collar.

Get the look: Allegra K Summer Doll Flare Dress, $17.29

A printed bag adds a modern touch to the ensemble.

Get the look: TrendsBlue Elegant PU Leather Floral Turnlock Flap Clutch, $52.99

You can't go wrong with a pair of timeless black leather pumps.

Get the look: Nine West Flax Dress Pump, $69

Seyfried's fun, round sunnies are a refreshing addition to her monochromatic palette.

Get the look: SUMOLUX Vintage Inspired Classic Style White Frame/Brown Lens Round Sunglasses, $21.90