It's Mrs. Reynolds!

Although she's been spotted on the Gossip Girl set, at pal Amber Tamblyn's recent weekend wedding and elsewhere, Blake Lively hit the red carpet at Chanel Bijoux De Diamant 80th Anniversary bash in NYC Tuesday -- her very first official appearance since she wed Ryan Reynolds Sept. 9.

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The 25-year-old Gossip Girl star (and the face of Chanel's Mademoiselle bag) hit the stylish event in a sexy, backless silver gown by Chanel Couture, which conveniently featured pockets for her to hide her wedding and engagement bands from photographers. "The dress is actually made of jewelry," Lively told reporters.

One thing impossible to conceal? Lively's wedded bliss!

PHOTOS: Blake's hot body evolution

Looking even more radiant than usual, an overjoyed Lively lit up when asked about her life these days. "Life is great!" gushed the star, who wore her own Christian Louboutin shoes for the event, plus a diamond broach. "I was so excited to be driving over here in the car in this beautiful outfit. It's like a Disney princess dress!"

The actress' husband made a much more low-key appearance inside the event. The scruffy Safe House actor, 35, arrived separately and couldn't keep his eyes off his bride, checking her out from across the room before meeting up.

PHOTOS: Ryan Reynolds' hotness evolution

Another big milestone for the newlywed actress? Gossip Girl begins shooting its very last episode on Wednesday. "Can you believe it?" Lively said. "And they actually don't tell us what happens. But they do reveal who Gossip Girl is -- I will say that much."

This article originally appeared on Blake Lively Stuns on Post-Wedding Red Carpet, Says "Life Is Great"