Who: Kate Bosworth

Where: At Global Green\'s annual pre-Oscars party in Los Angeles.

Wore: A black strapless cocktail dress adorned with large netting flowers by Loewe, and black pumps.

Who: Leigh Lezark

Where: Backstage at the BCBG Max Azria autumn/winter 2009 show during New York Fashion Week.

Wore: A black leather jacket over a nude vest, with black shorts, stockings and suspenders and black chunky heeled sandals.

Who: Alexa Chung

Where: At the Twenty8 Twelve after show party during London Fashion Week.

Wore: A navy cropped-sleeve empire line coat, with pale pink silk shorts, a blue and white striped cardigan, black peep-toe shoes with socks, and a bubblegum pink handbag by Luella.

Who: Michelle Williams

Where: At the 2009 Film Independent Spirit Awards in Los Angeles.

Wore: A black, white and grey striped shift dress with pockets by Chloé, and mulberry patent pumps.

Who: Natalia Vodianova

Where: At a pre-Oscars dinner in Los Angeles.

Wore: An ice-green silk cocktail dress with a black pearl necklace and multi-strap heels by Giuseppe Zanotti.

Who: Mary-Kate Olsen

Where: At the Proenza Schouler autumn/winter 2009 show during New York Fashion Week.

Wore: A cobalt dress under a white blazer, with a wide black scarf, brown leather handbag, and black heels.

Who: Kate Bosworth

Where: At the Vanity Fair Oscars party in Los Angeles.

Wore: A studded, shimmering shift dress by Alexander McQueen, with gold metallic strappy heels and an orange minaudiere.

Who: Angelina Jolie

Where: At the Oscars.

Wore: A black strapless chiffon gown with sweetheart neckline by Elie Saab, poison green drop earrings by Lorraine Schwartz and a dark grey clutch.

Who: Tilda Swinton

Where: At the Oscars.

Wore: A beige and black silk ruffled dress by Lanvin, with twin gold bracelets.

Who: Natalie Portman

Where: At the Oscars.

Wore: A candyfloss pink strapless gown by Rodarte, with a minaudiere and diamonds.

See previous Week In Style galleries