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 March 27, 2015 @ 11:26AM Pin Share Tweet Email Trending Videos Photo: Dave Hogan/Getty Images Looks of the Week 01 of 22 Kate Mara David M. Benett/Getty Images for Jimmy Choo Kate Mara stole the spotlight at the unveiling of Jimmy Choo's VICES collection in a strapless collaged lime green J. Mendel mini, with gunmetal Jimmy Choo accessories. 02 of 22 Elle Fanning Gilbert Carrasquillo/FilmMagic Elle Fanning showed off her toned bod at the New York premiere of The Young Ones in a floral bralet and a black tie-waist skirt, both by Creatures of the Wind, styling them with a pair of red pumps. 03 of 22 Mary Elizabeth Winstead Gary Gershoff/WireImage Mary Elizabeth Winstead was the picture of perfection at the New York screening of Kill the Messenger in a strapless burgundy and blue-stripe embroidered Roksanda dress that she accessorized with a black clutch and aubergine pumps. 04 of 22 Hilary Swank Frederick M. Brown/Getty Images At the Academy's Hollywood Costume Luncheon, Hilary Swank gave her red carpet look a dapper twist and layered a sharp Saint Laurent suit over a neck-tie polka-dot blouse. Saint Laurent accessories, like her metallic clutch and Mary Jane platforms, a Melissa Kaye ring, and Graziela Gems onyx earrings completed her look. 05 of 22 Keira Knightley DAVE M. BENETT/WIREIMAGE Keira Knightley was a vision in a column of gold at The Imitation opening night gala. She swept onto the red carpet in an exquisite embroidered tiered Valentino Couture creation that she unexpectedly paired with red pumps. 06 of 22 Chloe Grace Moretz Jason LaVeris/FilmMagic Chloe Grace Moretz revealed a sliver of midriff at the PSLA Autumn Party in a black bustier top and a colorful shin-grazing pencil skirt, both by Donna Karan, and black PVC Louboutin pumps. 07 of 22 Gwyneth Paltrow Steve Granitz/WireImage Gwyneth Paltrow glowed at the Hollywood Costume Luncheon in an incredibly flattering Roland Mouret design that featured crisscross detailing and sheer paneling. Her shoes of choice? Black-and-white snakeskin lace-up Paul Andrew heels. 08 of 22 Kristen Stewart Jim Spellman/Getty Images Kristen Stewart smoldered at the Clouds of Sils Maria screening in a cool silver leather-embroidered black Chanel Couture design that she paired with black Louboutin pumps. 09 of 22 Emily Blunt Samir Hussein/Getty Images Emily Blunt was radiant at the IWC Gala Dinner in a fluro coral-and-white Roland Mouret gown that she impeccably styled with a gold timepiece, a chain link bracelet, and Jennifer Fisher rings. 10 of 22 Keira Knightley Tim P. Whitby/Getty Images For BFI Keira Knightley was all smiles at the Imitation Game photo call during the London Film Festival in a burgundy floral-print pleated ankle-grazing dress, complete with gold-embroidered black pumps. 11 of 22 Karlie Kloss Bruce Glikas/FilmMagic Karlie Kloss hit the American Associates of the National Theatre fundraising gala in head-to-toe Michael Kors-a black-and-silver embroidered dress with a silver python barrel clutch and delicate black sandals. 12 of 22 Taylor Swift Neil Mockford/Alex Huckle/GC Images Taylor Swift paid a visit to London's BBC Radio 2 in a perforated chevron-print black knit and a matching pencil skirt, both by Tanya Taylor, adding a dash of color with bubblegum pink Giuseppe Zanotti ankle-strap pumps. 13 of 22 Selena Gomez Jon Kopaloff/FilmMagic Selena Gomez was smokin' hot at the Rudderless screening in a plunging, micro-short red satin Dior dress, accessorizing with diamond drop earrings, a stack of bangles, a dark gray envelope clutch, and translucent Manolo Blahnik cap-toe pumps. 14 of 22 Naomi Watts Mike Pont/FilmMagic Naomi Watts made a divine statement at the New York premiere of St. Vincent in a soft blush pink sequined Jason Wu design, adding modern elements, like a silver Lee Savage clutch, Bulgari earrings, and metallic Louboutins, for a contemporary twist. 15 of 22 Diane Kruger Mark Sagliocco/FilmMagic The ever-stylish Diane Kruger stunned at the New York premiere of The Affair in a silver floral embroidered black Michael van der Ham dress with an off-shoulder cut and a sheer layered skirt. A black clutch and hot pink sandals served as her accessories. 16 of 22 Lily Collins David M. Benett/WireImage Lily Collins turned heads at the Love Rosie world premiere in a high-impact high-neck open-back Solace London column, complete with a Jacquie Aichie ear jacket and EF Collection rings. 17 of 22 Bella Thorne Gregg DeGuire/WireImage Bella Thorne was a belle on the red carpet at the LA premiere of Alexander and the Terrible, Horrible, No Good, Very Bad Day in an orange tiered Alberta Ferretti number with a deep-V neckline and high-low hem. She styled her look with layers of delicate strands, a selection of gilded bracelets and rings, and foil Stuart Weitzman sandals. 18 of 22 Leighton Meester C Flanigan/Getty Images Leighton Meester took a more relaxed approach for her red carpet look at the Like Sunday, Like Rain premiere, selecting a black scuba crepe top and cotton vine jacquard trousers, both by Narciso Rodriguez, with a white clutch and cobalt blue pumps. 19 of 22 Emma Roberts Parisa/Splash News At the American Horror Story: Freak Show premiere, Emma Roberts stunned in a dramatic cut-out black Saint Laurent number, styled with Derek Lam + Jamie Wolf for NYC Ballet earrings, rings by Dana Rebecca Designs and Meredith Marks, a glittery Edie Parker clutch and black suede cage Casadei heels. 20 of 22 Elle Fanning C Flanigan/Getty Images Elle Fanning graced the Low Down screening at the 2014 Mill Valley Film Festival in a neutral strapless Rochas gown that perfectly complemented her newly dyed brunette strands. 21 of 22 Marion Cotillard Stephen Lovekin/Getty Images Marion Cotillard was clad head-to-toe in Dior at the Two days, One Night premiere during the New York Film Festival. She layered a beautiful embroidered blue velvet cotton coat over a cream top and black quilted Bermuda shorts, complete with black pumps. 22 of 22 Dakota Fanning Dave Hogan/Getty Images Dakota Fanning had fun with fringe at the Effie Gray premiere, selecting a vibrant red suede fringe Valentino number with studded nude Valentino pumps.