1 of 47
The Harry Potter and the Half-Blood Prince works her red carpet magic in a Proenza Schouler leather-topped halter dress and strappy sandals at the film’s N.Y.C. premiere.
2 of 47
Even after spending the day shooting Gossip Girl in SoHo, the turns up in high style in her oversized houndstooth dress and peep-toe booties at the Cinema Society screening of (500) Days of Summer.
3 of 47
The goes for short and sexy in her mint green Christian Cota dress and Rene Caovilla clutch at the premiere of Entourage in Los Angeles.
4 of 47
The beams as she shops in Brentwood in a navy tank top, 3.1 Phillip Lim printed skort and gladiator sandals.
5 of 47
The adds a pop of color to her zebra-print dress, white blazer and Giuseppe Zanotti booties with a turquoise clutch at the Three-O Vodka Bubble launch in N.Y.C.
6 of 47
The Gossip Girl actress gets a jump on fall in her latex leggings, boyfriend blazer, Rarities by Carol Brodie earrings and chain-strap bag.
7 of 47
The British actress sticks close to home, enjoying the Annual Summer Party for the Serpentine Gallery in a watercolor print Matthew Williamson minidress and beige sandals.
8 of 47
The actress goes for chic simplicity in her ice blue satin sheath at the 2009 Outfest opening night gala in Los Angeles.
9 of 47
The Entourage actress shows her sexier side – and great gams! – in a printed DKNY bustier dress and Cecelia stingray clutch at the show’s sixth season premiere.
10 of 47
The Mad Men star sticks to a vintage look with her jewel-necked black dress and basic pumps at the Cinema Society and Brooks Brothers screening of (500) Days of Summer.
11 of 47
No maternity wear here! The pregnant Project Runway shows off her supermodel-long legs in a striped mini-skirt topped with a sexy cut-out dotted top for a visit to Good Morning America.
12 of 47
Bringing Harry Potter and the Half-Blood Prince stateside, the British dons a black piped sheer Christopher Kane sheath dress and a fringed 3.1 Phillip Lim clutch for a stop at the Late Show with David Letterman.
13 of 47
continues her fashionable New York City tour in a jeweled Zac Posen top and skirt, nude pumps, exotic Nancy Gonzalez clutch, House of Lavande ring, Joan Hornig cuff and soft waves for an appearance on Live! With Regis and Kelly to promote her new movie I Love You, Beth Cooper.
14 of 47
The Hills star adds trendy accessories – a studded Alexander Wang bag and ankle cuff suede sandals – to her nautical-inspired striped dress and black blazer for a visit to the MTV studios in New York City.
15 of 47
The keeps it breezy in a black and white printed shirtdress, platform sandals, Linea Pelle bag and her signature dark Sama shades for an outing in Beverly Hills.
16 of 47
90210’s newest addition tones down her bright orange dress and yellow flats with a simple black cardigan for the Moods of Norway U.S. launch party in Beverly Hills.
17 of 47
Adding star power to Paris Haute Couture Week, the singer shows off her shape in a button-front lace corset dress and mini tuxedo jacket at the Jean Paul Gaultier show.
18 of 47
The actress is the picture of elegance in her satin tuxedo wrap dress and simple black accessories, including a beaded clutch and matching peep-toe heels, at a party in London.
19 of 47
makes a sexy statement in a plunging blue pencil dress with sheer side cut-outs and platform pumps outside her Manhattan hotel.
20 of 47
The fashion – and Oscar-winning actress – strikes a pose in her floral Armani Privé gown, beaded heels and matching clutch at the Italian designer’s haute couture show in Paris.
21 of 47
From a sexy world tour to Paris haute couture, vamps up Giorgio Armani’s front row in a curve-hugging one-shoulder dress from the designer’s Privé couture collection, Brian Atwood pumps and red-hot lips.
22 of 47
She’s all grown up! The Harry Potter and the Half-Blood Prince star braves the London rain in a plunging, floral vintage Ossie Clark maxidress with a matching skinny red headband at the movie’s UK premiere.
23 of 47
The stops Manhattan traffic in her Elizabeth and James trumpet sleeve minidress, Giuseppe Zanotti peep-toe booties, purple Nancy Gonzalez clutch and Joan Hornig earrings as she continues promoting her new movie, I Love You, Beth Cooper with a stop at MTV’s It’s On With Alexa Chung.
24 of 47
enjoys a sunny day in a bold blue belted dress and coordinating black accessories while shopping in Beverly Hills.
25 of 47
26 of 47
The plays supermodel in her glimmering Calvin Klein Collection gown set off with red-hot painted nails and toenails at the label’s invitation-only dinner in Paris.
27 of 47
Also in Calvin Klein Collection, Newton opts for a second-skin swirl-print dress and lace-up stilettos for the label’s private dinner in Paris during couture week.
28 of 47
The OP model helps the brand launch their fall ad campaign in a head-to-toe look from the label accessorized with a gold Dannijo necklace and neutral platforms at a party in West Hollywood.
29 of 47
The Hills star leaves all the drama behind in her soft floral sundress and strappy tan sandals at the OP launch party in West Hollywood.
30 of 47
balances her flirty black-and-white polka-dot miniskirt with a chic menswear tuxedo jacket – both from Louis Vuitton –, black patent peep-toes and matching clutch at a Vanity Fair and Louis Vuitton cocktail party in Beverly Hills.
31 of 47
The puts her fashion superpowers to use in a sexy black lace Caroline Seikaly minidress, House of Lavande jewels and strappy Stuart Weitzman platforms for an appearance on the The Late Show with David Letterman in New York City.
32 of 47
After wowing fans in her new ultra-couture Givenchy by Riccardo Tisci tour costumes, her goes for a relaxed white suit topped with a fedora and a Loree Rodkin necklace for dinner in London.
33 of 47
takes a casual approach in a billowy white camisole top and cuffed khaki pants for dinner in Miami’s South Beach.
34 of 47
The turns fashion star in her sharp-shouldered piped blazer, messy chain statement necklace, platform heels and luxe shades while out in Beverly Hills.
35 of 47
The face of Christian Dior stays loyal to the brand in a chic belted sheath dress, studded sandals and red lips for the fashion house’s couture show in Paris.
36 of 47
The stylish star makes a high-fashion statement in her jeweled-neck Proenza Schouler dress and Giuseppe Zanotti Design platform gladiator sandals at the photocall for Harry Potter and the Half-Blood Prince in London.
37 of 47
The star is elegant at the Louis Vuitton and Vanity Fair party in a classic black sheath dress with puffed-up sleeves and ribbon-tied pumps – both from the French label.
38 of 47
Roberts goes for high drama in her colorful military-inspired Louis Vuitton jacket and Current/Elliot jeans paired with smoky eyes for the brand’s Vanity Fair party in Beverly Hills.
39 of 47
The is perfectly set for summer in her one-shoulder white dress and metallic sandals as she kicks off the holiday weekend in Las Vegas.
40 of 47
continues promoting The Proposal abroad, making an elegant stop in a black evening suit at the London premiere.
41 of 47
is casually chic in cuffed jeans, a layered top and an oversized duffel purse at the Hugo Boss Orange fashion show in Berlin
42 of 47
is city chic in a fitted blazer, distressed jeans and a luxe tote as she makes her way through the streets of Manhattan.
43 of 47
takes an easy approach to travel attire, leaving her N.Y.C. Hotel in a flowing A.L.C. gray maxidress and coordinating sandals.
44 of 47
The French actress gets a major boost from her maroon velvet wedges as she attends the Public Enemies premiere in Paris in a pale pink Dior dress.
45 of 47
The Harry Potter star hits a British talk show in a beige dress with a flared peplum and towering gold platforms.
46 of 47
matches her stunning white Andrew Gn strapless dress to dramatic arm cuffs as she arrives at her husband and ‘s White Party in Los Angeles.
47 of 47
The actress keeps cool at the SoBe Lifewater Fourth of July pool party in Santa Monica in a belted Kimberly Ovitz dress and tan sandals.
All The Outfits Kylie Jenner Has Worn to Hide Her Pregnancy
Our Affordable Obsession of the Day: Everlane's Mockneck Sweater
Fashion Week Jets to Milan! See All the Can't-Miss Moments from Italy