Credit: Humberto Carreno/Startraks Photo: Blake Lively Leaves David Letterman on September 27, 2010
It must have been pretty chilly out when Blake Lively (Serena) stopped by the Late Show. The leggy actress, who’s usually a fan of itty bitty cocktail dresses, opted for slim fit jeans, a button-down, a leather trench, and a scarf. That’s a lot of layers for the same woman who regularly employs strategic cutouts to show off even more skin than her revealing outfits already display. Of course, we couldn’t be more pleased by Blake’s autumn-appropriate look  — after all, we can’t pretend it’s summer for much longer. We’re loving the subtle ‘70s of vibe of Blake’s caramel-colored leather trench, and we approve of keeping the reference subtle with contemporary skinny jeans. All in all, this is a look we’re happy to copy as the leaves begin to turn, and with our handy guide, it all can be done without dipping too far into your seasonal savings.

Fall into Blake’s autumn style:
This retro leather trench is a new approach to fall outerwear that transcends trend but still looks just right. Wet Seal Belted Trench Jacket, $29.50; Begin layering with a white lace tank from your recently retired summer wardrobe. Delia's Audrey Lace Racerback, $29.50; A chambray button-down also translates well from to warm to breezier weather. byCORPUS Chambray Button-Down, $58; Carry your essentials in a swingy shoulder bag in a hue similar to your jacket. Giani Bernini Glazed Flap Shoulder Bag, $85; Streamline your accessories and sport one statement piece like this unique geometric bauble. Low Luv by Erin Wasson Hexagon Cocktail Ring, $47.85; Go for glamour despite a casual look with these sky high platform pumps. Miss Me Avaline Platform Pump, $59.95; Use this cozy scarf for form and function as temperatures continue to drop. V. Fraas Cotton Plaid Scarf, $38; Avoid the urge to pair a seventies style jacket with wide legs and sport a pair of deep blue skinnies. ECI Jeggings, $39