Blake Lively's style transformation

Even as a teen, the starlet, here accepting the breakthrough award at Music Box in L.A. in 2006, knew a little black dress goes a long way.

She was the bright spot at a New York City gala sporting a flowing yellow Michael Kors gown in 2008.

The all-American beauty amps up basic black Ralph Lauren with chic satin gloves at the Metropolitan Museum of Art Costume Institute Gala in 2008.

She looked as beautiful as a bride in Chanel at the premiere of 'Green Lantern,' the movie where she met now-husband, Ryan Reynolds.

Flocks of fashion editors have raved over the grey and black-feathered Gucci dress she wore to the MET's Costume Institute Gala in 2013.

She supported designer Michael Kors by wearing his designs to the Michael Kors New York Fashion Week show.

She showed off her sky-high gams in this orange leather minidress for a Hurricane Sandy relief concert.

She was stunning in a vintage-inspired dress at the Van Cleef & Arpels redesigned New York 5th Avenue Flagship event.

Blake showed off her minimalist approach to style with this white ensemble the Chime For Change concert.

The actress was striking in a cobalt blue trouser suit for the opening of Lady Gaga's workshop at Barneys.

Blake opted for this edgy maroon with PVC panel number when she attended 'The Croods' New York premiere in this maroon number.

The 26-year-old turned heads at the Gucci show during Milan Fashion Week this year, wearing a body-con, mustard-yellow halter dress that showed off the actress’s incredible figure.

Blake went the retro route at the 2014 CFDA Awards in a gold mini dress, pink pumps and big, Brigitte Bardot-inspired hair.

At the Met Gala, she was every inch the sexy screen siren in a pale-pink Gucci number that showed off her décolletage.

Blake stunned at Cannes in a black-and-white gown that showcased her trim figure, while Ryan was dapper in a black suit with a white bow tie.

Even without her handsome husband in tow, Blake stole the spotlight on the Cannes red carpet in a scarlet Gucci number.