Summer's Most Stylish Leading Ladies

Talk about box-office smashes! Rachel, Sienna, Cameron and more have been heating up the red carpet with their sexy and sweet styles

01 of 11

RACHEL MCADAMS

RACHEL MCADAMS
Jemal Countess/Getty; Doug Meszler / Splash News Online

From a sexy, plunging Emilio Pucci to a sophisticated 3.1 Phillip Lim sheath, The Time Traveler’s Wife kept hearts fluttering in New York City and beyond while promoting the romantic film.

02 of 11

SIENNA MILLER

SIENNA MILLER
Junko Kimura/Getty; Chelsea Lauren/WireImage

Forget the onscreen action! The G.I. Joe: The Rise of Cobra kept fans on the edge of their seats with her rotating wardrobe, including this shimmering, black-and-blue Gucci suit for the flick’s Tokyo premiere followed by a lizard-print YSL gown for the L.A. screening.

03 of 11

CAMERON DIAZ

CAMERON DIAZ
Jose Perez / Splash News Online; Dimitrios Kambouris/WireImage

What’s the best way to promote a teary drama? With a smile, of course! gave her mega-watt grin center stage with sleek silhouettes from Stella McCartney and J. Mendel while promoting My Sister’s Keeper in New York City.

04 of 11

RENéE ZELLWEGER

RENéE ZELLWEGER
Jemal Countess/Getty; Richie Buxo / Splash News Online

Fashion Week might not be until September, but created her own runway show modeling one stunning Carolina Herrera dress after another while promoting My One and Only in New York City.

05 of 11

MEGAN FOX

MEGAN FOX
Jun Sato/WireImage; Anita Bugge/WireImage

The sultry went for major sex appeal while taking Transformer: Revenge of the Fallen overseas in slit-up-to-there gowns, including a slinky, purple Donna Karan gown and a red-hot cutout Roberto Cavalli.

06 of 11

DIANE KRUGER

Image
IC/Flynet; Picture Perfect/Rex USA

might have been the Inglourious Basterds leading man, but all eyes were on the leading lady’s high-fashion frocks, including a second-skin nude Hervé Léger dress for the Berlin premiere and a crystal-fringed Atelier Versace mini for the Los Angeles screening.

07 of 11

EMMA WATSON

EMMA WATSON
Jon Furniss/WireImage; RAM/Fame

Proving her fashionista status is international, the British effortlessly switched between teen-queen sweet in a vintage floral Ossie Clark maxidress in London to downright sexy in a leather-topped Proenza Schouler number in New York for the Harry Potter and The Half-Blood Prince premieres.

08 of 11

KATHERINE HEIGL

KATHERINE HEIGL
Axelle/Bauer-Griffin; Joel Ryan/AP

New movie, new hair! complemented her new brunette tresses with glamorous frocks from Lanvin and Naeem Khan while premiering her romantic comedy, The Ugly Truth, in Los Angeles and London.

09 of 11

HAYDEN PANETTIERE

HAYDEN PANETTIERE
Ron Asadorian-Eddie Mejia/Splash News Online; Charles Sykes/AP

The I Love You, Beth Cooper flaunted her best asset – her tanned and toned legs! – in barely-there minis and sky-high heels, including a Zac Posen top and skirt and nude pumps for Live! With Regis and Kelly and a Caroline Seikaly dress and Stuart Weitzman shoes for The Late Show with David Letterman.

10 of 11

VANESSA HUDGENS

VANESSA HUDGENS
Jesse Grant/WireImage; CH / Splash News Online

She’s no band geek! The brought her sartorial savvy to the Bandslam red carpet first in a Georges Hobeika bubble dress topped with a House of Lavande bib necklace, followed by a tribal-print Hale Bob maxidress at a private screening.

11 of 11

AMY ADAMS

AMY ADAMS
Frazer Harrison/Getty; Jim Spellman/WireImage

Summer white never looked this hot! The Julie & Julia sizzled on the road in a RM by Roland Mouret asymmetrical sheath in Los Angeles and an off-the-shoulder, black-and-white floral Carolina Herrera gown in New York.

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