STYLE
08/24/2011 10:17 pm ET Updated Oct 11, 2012

Blake Lively: Style Evolution

It's hard to remember Blake Lively pre-Serena Van Der Woodsen. But before "Gossip Girl," the blonde beauty had her breakout role in "The Sisterhood of the Traveling Pants," alongside America Ferrera, Amber Tamblyn and Alexis Bledel.

Since her first red carpet appearance in 2005-- in shorn denim and a tight tee -- she's emerged to become a Vogue cover girl, Chanel ambassador and all-around stylish sophisticate. In honor of her 24th birthday today, take a peek at her most memorable looks.

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