Fashion Looks of the Week 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 December 13, 2013 @ 01:11PM Pin Share Tweet Email Trending Videos Photo: Dara Kushner/INFphoto.com Looks of the Week 01 of 22 Olivia Wilde Steve Granitz/WireImage WHAT SHE WORE At the Los Angeles premiere of Her, Olivia Wilde was radiant in a cobalt blue skintight David Koma pencil skirt dress with Perspex detailing that she accented with silver-capped Jimmy Choo pumps. 02 of 22 Kate Mara Richard Shotwell/Invision/AP WHAT SHE WORE Mara stunned at the Her premiere in a cargo metallic leaf jacquard two-tiered top and a matching leaf motif embroidered tulle crepe mini skirt dress, both by J. Mendel, styling it with a gold clutch and see-through platform heels. 03 of 22 Amy Adams Steve Granitz/WireImage WHAT SHE WORE Also at the Her premiere, Adams elevated a black Lanvin dress with statement add-ons, accessorizing it with sparkly belt, David Yurman jewelry, an embellished Valentino clutch and bead-embroidered Christian Louboutin pumps. 04 of 22 Anna Kendrick Trisha Leeper/WireImage WHAT SHE WORE Kendrick attended an award ceremony for fundamental physics and life sciences in a stunning black Temperley London gown with a sweetheart neckline and a sheer embellished yoke. She picked up on the beading, matching it with a gold Melinda Maria ring and a gold mirrored clutch. 05 of 22 Rooney Mara Andrew H. Walker/Getty WHAT SHE WORE At the Oxfam Charity Gala, Rooney Mara gave her white custom one-shoulder Lanvin stunner a moodier spin with a slicked back 'do and a vampy lip. 06 of 22 Allison Williams Jon Kopaloff/FilmMagic WHAT SHE WORE Williams attended a breakfast celebrating women in entertainment in a nude leather-and-cashmere dress and black leather sandals, both by Calvin Klein Collection. A set of danglers completed her look. 07 of 22 Kristen Wiig Eva Oertwig/SCHROEWIG/picture-alliance/dpa/AP WHAT SHE WORE Wiig sashayed on the red carpet at The Secret Life of Walter Mitty premiere in a Martin Grant dress with a graphic black-and-white printed bodice and a full tea-length skirt. She accessorized with Vita Fede jewelry and shiny Manolos. 08 of 22 Leslie Mann Eamonn McCormack/WireImage WHAT SHE WORE Instead of dresses, Mann walked the red carpet at the Anchorman 2: The Legend Continues premiere in a white wool satin-lapel tuxedo Viktor & Rolf jumpsuit with a gray overcoat, Irene Neuwirth earrings, a black Edie Parker clutch and black pumps with silver detailing. 09 of 22 Blake Lively Neilson Barnard/Getty WHAT SHE WORE At the Van Cleef & Arpels flagship store in New York City, Blake Lively celebrated the redesign in a black bias Marchesa slip dress with pastel floral embroidery, Chantilly lace cut-outs and a tulle flounce skirt. Van Cleef & Arpels jewels and black Gucci heels completed her look. 10 of 22 Lily Collins Cooper Neill/Getty WHAT SHE WORE Collins flew to Dallas, Texas to sit in the front row of the Chanel show in a sequined V-neck cap-sleeved dress with black thigh-high suede boots, both by Chanel. 11 of 22 Olivia Palermo Andrew Toth/Getty WHAT SHE WORE Nothing injects a touch of luxe like fur. Palermo elevated her black V-neck top and denim skinnies with a Dennis Basso fur coat and olive-green ankle-strap pumps. 12 of 22 Kate Mara Stefanie Keenan/WireImage WHAT SHE WORE At the Parker Party, Mara accented her black Everlane sweater with an embellished Miu Miu peter pan collar, styling it with black James Jeans skinnies, an Everlane tote and bejeweled Miu Miu pointy-toe pumps. 13 of 22 Michelle Dockery Laura Cavanaugh/FilmMagic WHAT SHE WORE Dockery got leggy at the Downton Abbey New York City photocall in a blush-pink long-sleeve Miu Miu mini dress embroidered with black floral threadwork, pairing it with EF Collection studs, a dark clutch and champagne satin peep-toes. 14 of 22 Evangeline Lilly Eva Oertwig/Schroewig/DPA/ABACAPRESS.COM WHAT SHE WORE Evangeline Lilly swept onto the red carpet at The Hobbit: The Desolation of Smaug premiere in a black slightly sheer Alberta Ferretti gown with a lace overlay and tiers of tulle at the skirt, keeping all accessories to a minimum, save for studs and a Vita Fede rose gold-and-gunmetal bracelet. 15 of 22 Amy Adams Gregorio T. Binuya/Everett Collection WHAT SHE WORE At the American Hustle screening, Amy Adams wore a sexy black Elie Saab gown with lace panels, styling it with Neil Lane jewelry. 16 of 22 Diane Kruger B. Cool/Splash News WHAT SHE WORE Kruger embraced the sheer trend at the 2013 European Film Awards in a sky-blue embellished Valentino Couture creation with a see-through hem. A black clutch served as her only accessory. 17 of 22 Anna Kendrick Greg Allen/Invision/AP WHAT SHE WORE Kendrick wowed at the Kennedy Center Honors Gala in a red-hot Elie Saab gown, styling it with Graziela Gems earrings, rings by Dana Rebecca Designs and EF Collection, and a metallic Rauwolf minaudiere. 18 of 22 Zoe Saldana Sergi Alexander/Getty Images WHAT SHE WORE Saldana pulled off an all-white menswear-inspired ensemble, pairing her Lanvin blazer and matching high-waisted trousers with a white top, 5-tier Jamie Wolf earrings, a teardrop EF Collection bangle, a delicate gold necklace and metallic Christian Louboutin pumps. 19 of 22 Jennifer Lopez Jon Kopaloff/FilmMagic WHAT SHE WORE Lopez took a break from skintight silhouettes and went for a strapless floral Bibhu Mohapatra dress, accessorizing it with a black Swarovski clutch, drop earrings, a smattering of bracelets and rings, and white python Christian Louboutin pumps. 20 of 22 Michelle Williams Billy Farrell/BFAnyc/Sipa WHAT SHE WORE At the Louis Vuitton Art Basel Beach Barbecue event, Michelle Williams (in head-to-toe Louis Vuitton) was the epitome of chic, effortlessly styling her stripe tiered skirt with a slouchy blue sweater, the brand's signature checkered clutch and mustard yellow sandals. 21 of 22 Jennifer Garner Matt Baron/BEImages WHAT SHE WORE Garner posed at the Children's Defense Fund's 23rd Annual Beat the Odds Awards in a black Valentino dress with a white lace overlay at the bodice, pairing with black pumps. 22 of 22 Zoe Saldana Dara Kushner/INFphoto.com WHAT SHE WORE Saldana topped off her gray cut-out dress with a statement black-and-white Dolce & Gabbana plaid overcoat and nude ankle-strap Christian Louboutin pumps.