"Mad Men" star Elisabeth Moss goes from darling to sexy with a new blonde hairstyle. Photos: Jason LaVeris/FilmMagic.com | Bryan Bedder/Getty Images

Just as Peggy Olson has evolved on "Mad Men" from a demure, prudish secretary to a pot-smoking, strip club crashing copywriter, Elisabeth Moss is transforming her image, too.

Last night, the 28-year-old actress debuted a sexy new look at the 38th International Emmy Awards in New York City, and we must say, Moss has never looked better!

Her old, mousy brown locks were glammed up with long, wavy hair extensions accentuated with golden blonde highlights -- a beautiful choice for her blue eyes and fair skin.

Moss also donned a gorgeous Bibhu Mohapatra peach embroidered gown complete with large hoop earrings. And let's not overlook her bronze cheeks and glossy lips.

We can't wait to see what's next for Elisabeth (and Peggy)!

If you think Moss looked sexy last night, take a look at her on the September cover of Rolling Stone!

And click here to see how all the ladies of "Mad Men" have evolved style-wise