Blake Lively Shows Off Her Baby Bump in a Skin-Tight Backless Dress

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Looks like Blake Lively has mastered the art of dressing sexy while pregnant.

The 27-year-old Gossip Girl star stepped out at the L'Oreal Paris' 2014 Women Of Worth Celebration Tuesday night in New York City, proudly showing off her growing baby bump in a form-fitting black backless KaufmanFranco gown.

Blake -- the face of L'Oreal since last October -- accessorized with a dangly pair of statement earring and sparkly bangles to complete her bombshell look.

She also stopped dying her signature blonde hair, revealing her brunette roots.

PHOTOS: Blake Lively's Most Amazing Pregnancy Looks

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The Preserve guru announced that she's expecting her first child with husband Ryan Reynolds in October, but has yet to reveal her due date.

She did, however, recently open up to ET about the specific challenges of maternity style.

"It's very different getting dressed with a watermelon as a stomach," she joked at the God's Love We Deliver Golden Heart Awards on Oct. 15.

VIDEO: Eva Chen's 9 Tips for Flawless Pregnancy Style

Check out the video below to hear more of Blake's challenges while walking the red carpet pregnant.