Hilary Duff lives in casual staples—"I'm a jeans girl"—and uses them as a starting point for almost any occasion: "When I'm going out, I tend to just transition my outfits from day to night," she explains, by adding on pretty cardigans or striking shoes and jewelry to up the glam factor.
Despite being on one of TV's most trendsetting series, Jessica Szohr still considers herself a fashion novice. "I'm learning more and more about clothes and designers from being a part of Gossip Girl and living in New York," explains the 25-year-old.
These days, Keri Russell is channeling a '40s tomboy aesthetic. "I'm into the sexy masculine thing. All the clean lines and tailoring are so classic," says the actress.
Amanda Seyfried makes dressing comfortably a high priority—but without sacrificing style and originality. "I love Stella McCartney and Alexander Wang," says the 24-year-old actress. "They both make casual clothes that have a little something extra going on—which is what I want."
Olivia Wilde's alter ego—at least when it comes to fashion—is French: "I find myself constantly pretending I'm a chic Parisian." Her fashion favorites are easygoing, sophisticated, and of course, très belles.
She spends so much time on the road touring that she's had to distill her style when she's out of the public eye into one category: comfortable. "I love dressing up when I'm in front of a crowd, but in my downtime, nothing beats a great pair of sweats."
Forever one step ahead of the next big trend, this tastemaker's wardrobe is always adorable. "I'm constantly trying new things and experimenting," she says.