Elisabeth Moss oozed Old Hollywood glamour March 13 at the 2011 Olivier Awards in London wearing a nude Roksanda Ilincic gown.

The actress -- who is in London for her latest project: a role in the play "The Children's Hour," along with Keira Knightley -- toted a matching Jimmy Choo clutch.

And just as Peggy Olson has evolved on "Mad Men" from a demure, prudish secretary to a pot-smoking, strip-club-crashing copywriter, this Los Angeles native is transforming her image, too. The 28-year-old accentuated her new, lighter 'do with golden-blond highlights, a beautiful choice for her blue eyes and fair skin.

And for someone who isn't allowed to diet or exercise, Miss Moss isn't afraid to flaunt her killer curves -- she donned a racy pink strapless number on the cover of Rolling Stone.