It may still be sunny across the nation, but Lily Collins took a cool-weather beauty look for a spin at last night's Mexico City premiere of The Mortal Instruments: City of Bones. She traded in casual, summery locks for a well-polished coiffure that would look amazing with Fall's jewel-toned makeup and sexy smoky eyes. "Lily wore a gorgeous cutout dress that showed off her beautiful shape," said celebrity stylist Mara Roszak. "It was a classic yet incredibly sexy look that inspired the '40s brushed waves."

To create Lily's shiny curls, Roszak first prepped her damp hair with mousse before rough-drying her hair. Next, she curled sections of Lily's hair with a 3/4-inch curling iron towards her face and set the look with pin curls. "The key is to create the perfect S wave in front of the face by manipulating the hair with a comb and pinning in place," Roszak explained. "Once the head was set, I sprayed all over with L'Oréal Extra Strong Hold Elnett Hairspray ($15)."

Lily completed the glamorous look with equally stunning makeup. She focused on a bright purple lipstick hue, balancing out the look with her signature bold brows and a silvery smoky eye complete with winged eyeliner. Her Fall palette and glossy waves have us excited to transition into a new season ahead.