Shailene Woodley attends the "Red Lights" Screening on June 25, 2012 in New York City. Credit: Craig Barritt/Getty

Shailene Woodley is no stranger to taking sartorial risks, but her look at Monday's Red Lights premiere wasn't something even the most eclectic fashionista might have admired.

The Descendants star, who went completely makeup-free save for some black eyeliner, looked casual and a bit grungy in black skinny jeans and an oversized, ill-fitting orange plaid flannel shirt, teamed with black flats. Her hair, usually done in trendy braids and updos, was styled with loads of gel that left her long brunette strands looking as if she just stepped out of the pool.

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Her laid-back look was a far cry from the sexy, plunging Stella McCartney pantsuit she wore to the MTV Movie Awards earlier this month, not to mention all the elegant gowns she chose during Awards Season earlier this year.

And even though the Secret Life of the American Teenager star can pull off couture as well as a red carpet veteran, Woodley, 20, has admitted that she's far from a fashionista.

"I'm very lucky to work with a stylist who cares about fashion, because I don't at all," the 20-year-old actress admitted in an interview with Malibu magazine.

"And I'm very lucky to have a makeup artist and hair guy who are really good at what they do, because I would go to events with no makeup and no hair and in pajamas if I could," she added.