Elizabeth Olsen and Other Best Dressed Celebs of the Week

It was head-to-toe Alexander McQueen for the youngest Olsen sister at the festival’s showing of her movie. Elizabeth’s halter dress featured a slightly sheer ruffled skirt set off by a flashy waistband. Alexander McQueen’s skull clasp clutch, black velvet embellished wedges as well as Pamela Love’s ring and bracelet all served as accessories.

Image: Ivan Nikolov/WENN.com

Michelle was decked out in Christian Dior at the pre-screening cocktail party for her latest film. Her gown with black velvet accent came from the fashion house's Spring 2012 collection and featured an usual as well as revealing neckline.

Image: Ivan Nikolov/WENN.com

Although it's debatable whether she complied with the match's old-school theme, Zoe still looked fabulous in this Jason Wu Spring 2012 dress. She also sported both Sydney Evan and Jack Vartanian jewelry as well as a pair of nude Brian Atwood Zenith ankle-strap platforms.

Image: Daniel Tanner/ WENN.com

Jaime also opted for Jason Wu when she attended the festivities at Will Rogers State Historic Park. She actually pulled a look straight off the runway with this Spring 2012 white Swarovski embellished silk dress including a black leather bow and two-tone multi-strap sandal combination.

Image: Daniel Tanner/ WENN.com

Ali went vintage for the classic borrowing this Karl Lagerfeld romper from a family member's closet. A pair of sunglasses by Oliver Peoples and black heels rounded out the throwback look.

Image: Daniel Tanner/ WENN.com

Lucy hopped on the Giambattista Valli bandwagon by wearing this Fall 2011 dress to the unveiling of her book in New York City. Her black tights and ankle boots tied in well with the black and white floral print, while that aqua clutch added a pop of color.

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She may not be a household name in Hollywood, but Mary definitely was the standout at her film’s premiere. This red Christian Dior gown almost blended into the red carpet at the AMC Universal CityWalk. She finished off the elegant look with a Swarovski clutch, H. Stern jewels and Brian Atwood heels.

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The busy actress is back on this week’s list courtesy of this strapless metallic Giorgio Armani Spring 2012 number. Emma's ombre dress featured gathered detailing as well as a crescent-shaped bodice and was partnered with neutral pumps by Brian Atwood.

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She may be a Guess girl, but that didn’t stop Amber from sporting a fitted white Emporio Armani dress with one-sided ruffle detail to the private soiree. She styled the crisp look with a long bronze clutch and matching strappy satin sandals also by the brand.

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Gillian continues to break away from her Scully persona by donning another show-stopping dress over in London. This black vintage Christian Dior cocktail selection was amplified by diamond chandelier earrings from Ritz Fine Jewellery.

Image: WENN.com

Elizabeth Olsen at the 49th Annual New York Film Festival Premiere of Martha Marcy May Marlene

It was head-to-toe Alexander McQueen for the youngest Olsen sister at the festival’s showing of her movie. Elizabeth’s halter dress featured a slightly sheer ruffled skirt set off by a flashy waistband. Alexander McQueen’s skull clasp clutch, black velvet embellished wedges as well as Pamela Love’s ring and bracelet all served as accessories.

Image: Ivan Nikolov/WENN.com