Lily Collins plays Clary Fray in the "The Mortal Instruments: City of Bones," the big screen adaptation of Cassandra Clare's young adult series. In real life, the fresh-faced 24-year-old with those signature full eyebrows keeps her street style grounded, and her red carpet style fantastical.

What does Lily Collins like to wear? Snapped out and about with boyfriend Jamie Campbell Bower, or with friends, the "Stuck In Love" actress keeps it low-key. Soft t-shirts layered under work shirts. Cuffed jeans worn with platform clogs. A playful scarf worn as a headband. Lily likes her off duty style to be functional but not grungy, which explains the designer handbag or the high heels.

Lily Collins's movie career has taken her to fairy tale territory as Snow White in "Mirror Mirror." This time angel blood runs in her veins as Clary Fray. No wonder an element of fantasy always makes its way into Lily Collins's red carpet dresses. She favors airy tulle with breathtaking embroidery, or opulent brocade in classic silhouettes. One of Lily's best looks was her Monique Lhuillier tulle gown for the 2012 Vanity Fair Oscar Party.

Lily doesn't always play the lovely princess. When she attended the 2013 Met Gala, Lily fully embraced the punk theme. She sported blue hair and an outfit that mixed lace with a dash of Hell's Angels. "The English Teacher" actress isn't afraid to take fashion risks either. Lily Collins showed that, and maybe some weight loss, when she wore a Paule Ka dress with a neckline that plunged almost to her waist. A big bow in the back made for a dramatic look.

For less formal events, Lily Collins likes to show some leg. She often pairs shorts with a blazer. Mini dresses are also great for her.

Whichever style personality Lily Collins feels like showing off, the actress knows the value of a signature look. For Lily, full, well-groomed brows and a defined lip are her must-haves.

Start the slideshow to see the "Mortal Instruments" star and her standout looks, and click here for some Lily Collins-inspired outfits.