
Megan, en route to the Ad Club of New York’s awards ceremony, in a floor-length jacquard dress with influences from India and Morroco. Mad Men costume designer Janie Bryant says the dress “was not thought of as a conservative thing during that period. It was very chic and fashionable.”

Megan in another pink jacquard look, this one paired with a boblike bouffant hairstyle, jeweled hoop earrings, and winged eye makeup.
Jordin Althaus/AMC
Megan, in the episode “The Flood,” connects with advertising professionals for the first time this season, an interaction that underscores the differences between her dramatic new style and that of her fomer co-workers, including Peggy Olson, Don Draper’s copywriting protégée, who has maintained a classic sense of style throughout the series’s run.
Michael Yarish/AMC
Megan plays the sultry Colette on her soap opera To Have and to Hold, wearing a bright red crocheted jumpsuit.
Michael Yarish/AMC
Megan wears a Space Age minidress in “For Immediate Release,” an outfit she wore to recapture her husband’s sexual attention.
Michael Yarish/AMC
In “The Crash,” Megan leaves the Draper children at home alone, putting them in Sally’s care. She wears a paisley minidress and nude fishnet tights for a night out with producers.
Jordin Althaus
Megan’s sartorial evolution begins in Season 5’s finale, when she books her first acting role in a commercial for Butler Shoes. Her Snow White–type costume kicked off a season’s worth of souped-up ’60s fashions.
Michael Yarish
Promotional photos for Season 6 highlight the differences between Megan’s and Betty’s signature tastes. Megan epitomizes ’60s newness, while Betty’s outfit expresses the ’50s’ feminine elegance.
Frank Ockenfels/AMC