Fashion Clothing Inside and Out By InStyle Editors InStyle Editors Facebook Instagram Twitter Our editors and writers comprise decades of expertise across the beauty, fashion, lifestyle and wellness spaces in print and digital. We prioritize journalistic integrity, factual accuracy, and also having fun with every story we share. InStyle's editorial guidelines Updated on April 1, 2015 @ 03:22PM Pin Share Tweet Email Trending Videos Photo: Peter Kramer/AP Inside and Out 01 of 26 Katie Holmes Henry Lamb/BEImages When the weather outside is frightful, stars cover up their couture in equally spectacular coats. Check out what they've got underneath-and find out their secrets to cold-weather style. THE COAT: Ever-stylish Katie Holmes showed some leg in a mini-coat from Fay. 02 of 26 Katie Holmes John Paul Filo/Landov THE OUTFIT: Holmes walked on to the set of Late Show with David Letterman in a mod minidress from Balenciaga.STYLE LESSON: Match the length of your coat to your dress for a perfectly coordinated look. 03 of 26 Jessica Alba Stephen Lovekin/Getty THE COAT: Alba donned her favorite military-style Couture Couture coat for a premiere of The Eye. 04 of 26 Jessica Alba Bill Davila/Startraks THE OUTFIT: The expectant star wore a little lace dress from Marchesa along with bejeweled Louboutins.STYLE LESSON: Match opaque tights to your topper for a long lean look. 05 of 26 Kate Hudson Marcel Thomas/FilmMagic THE COAT: Hudson braved wintry Manhattan in a cozy fur from Dolce & Gabbana. 06 of 26 Kate Hudson Evan Agostini/AP THE OUTFIT: The Fool's Gold star wore head-to-toe silver Dolce & Gabbana to a party for the designers.STYLE LESSON: Add texture to your wardrobe with a real or fake fur. 07 of 26 Reese Witherspoon Rene Macura/AP THE COAT: Even Oscar winners can be thrifty-Witherspoon showed off her budget-conscious style with a Simply Vera by Vera Wang short-sleeved coat from Kohl's. 08 of 26 Reese Witherspoon Vince Bucci/Getty THE OUTFIT: Witherspoon wore a raspberry satin dress from Versace for her appearance at the BAFTA/L.A. Cunard awards.STYLE LESSON: Expand your coat wardrobe with thrifty picks from discount designer lines. 09 of 26 Maria Menounos Alex Berliner/BEImages THE COAT: At the premiere of 27 Dresses, Menounos showed off her slim waist in a belted tweed overcoat. 10 of 26 Maria Menounos Michael Williams/Startraks THE OUTFIT: Beneath her staid tweed was a red-hot dress from Pamella Roland.STYLE LESSON: Match the cut of your coat to the cut of your dress: Menounos's trench revealed a sliver of red dress. 11 of 26 Rosario Dawson Dimitrios Kambouris/WireImage THE COAT: Dawson hit an after-party for CNN Heroes: An All-Star Tribute in a military-style gray cape with a double row of buttons. 12 of 26 Rosario Dawson Scott Gries/Getty THE OUTFIT: Dawson donned a slinky floral dress from Dolce & Gabbana.STYLE LESSON: Add drama to a formfitting number with a voluminous coat or cape. 13 of 26 Lucy Liu Bryan Bedder/Getty THE COAT: Cashmere Mafia star Lucy Liu chose a high-drama white cape from Escada for her visit to Late Night. 14 of 26 Lucy Liu Gregorio Binuya/Abaca THE OUTFIT: Liu played up the patent belt of her fuschia Alexander McQueen dress with long leather gloves.STYLE LESSON: When wearing a cape or a coat with three-quarter-length sleeves, stay warm-and chic!-in long gloves. 15 of 26 Sarah Michelle Gellar Henry Lamb/BEImages THE COAT: Gellar chose a classic tweed coat with a modern cut for her visit to Late Night; the nubby topper had trendy short sleeves. 16 of 26 Sarah Michelle Gellar Henry Lamb/BEImages THE OUTFIT: A sexy Herve Leger bandage dress was anything but buttoned up.STYLE LESSON: A two-toned dress worn with a two-toned patterned coat makes a sophisticated style statement. 17 of 26 Blake Lively INF Goff THE COAT: The Gossip Girl looked fresh as a daisy in a yellow swing coat outside the Valentino Haute Couture show in Paris. 18 of 26 Blake Lively Francois Durand/Getty THE OUTFIT: Beneath her 60's-inspired coat was an off-the-shoulder white dress from Valentino.STYLE LESSON: No need to stay buttoned up after dark-a swing coat or fastener-free wrap is perfectly elegant for a quick jaunt from the car to the party. 19 of 26 Hilary Swank WENN THE COAT: Swank wrapped up in a winter-white coat for the Irish premiere of P.S. I Love You. 20 of 26 Hilary Swank WENN THE OUTFIT: Swank sizzled on the white carpet in a draped dress from YSL.STYLE LESSON: Try out winter white in a matching dress and coat-just watch out for dirty slush. 21 of 26 Jessica Simpson James Devaney/WireImage THE COAT: In N.Y.C., Simpson got in touch with her wild side in a leopard-print coat from Beth Bowley. 22 of 26 Jessica Simpson Kevin Mazur/WireImage THE OUTFIT: Simpson debuted her latest line of accessories in a silky teal dress.STYLE LESSON: A wild pattern in neutral shades will go with nearly any outfit-and add spice to your commute. 23 of 26 Rebecca Romijn Bill Davila/Startraks THE COAT: Following a visit to Late Night, Romijn returned to her Manhattan hotel in a baby-blue trench spiced up with red lipstick and shoes. 24 of 26 Rebecca Romijn Bill Davila/Startraks THE OUTFIT: Romijn showed off her model figure in a little black dress with a full skirt.STYLE LESSON: Choose your accessories to coordinate with both your outfit and your coat. 25 of 26 Amy Adams Patricia Schlein/WENN THE COAT: Adams hit the MTV studios in a bright purple peacoat. 26 of 26 Amy Adams Peter Kramer/AP THE OUTFIT: Wide-leg trousers and a tank from Peter Som perfectly complemented the star's Veronica Lake waves.STYLE LESSON: Your winter coat doesn't have to be basic black-stand out in a crowd (and in the snow!) in a bright jacket.