2010 Met Gala: Fashion's Biggest Party!

It’s Old Hollywood come to life as celebrates the silver screen siren in her slinky Ralph Lauren Collection silk charmeuse gown, accessorized with a clutch and heels from the designer with ’20s Fred Leighton diamonds – and her dashing beau, (in a William Rast tuxedo).

It’s déjà-vu as the on-again couple hit the red carpet in a navy lace Emilio Pucci dress and heels with Solange Azagury-Partridge jewelry for her and a trim tuxedo for him.

The is the belle of the ball in her silver sequin-dusted Zuhair Murad Haute Couture strapless gray gown, Judith Leiber clutch and Sergio Rossi slingbacks with Stephen Russell and Cartier jewelry.

stays true to her signature boho style in a shimmering silver Marc Jacobs Fall 2010 collection gown, clutch by the designer and a Harry Winston diamond bangle.

The Halston Heritage pays homage to the namesake designer’s heyday in her disco-ready pleated peach gown from the line, matching flower in her wavy locks and stacks of Fred Leighton vintage diamond bracelets.

With her ever-dapper husband on her arm, the wears a sweeping ’30s-inspired, vintage lamé gown from her own L.A.M.B. line with Lorraine Schwartz jewelry and a VBH clutch.

The leaves her signature sequins behind for a simply sophisticated, body-skimming Ralph Lauren Collection ivory gown with a clutch from the designer and Fred Leighton diamond and platinum jewels.

The may be divine in her ’30s-inspired Sophie Theallet for Gap dusty rose bias gown, a Ferragamo clutch and House of Lavande jewelry at the gala, but her dress is whisked off to auction tomorrow to benefit the Costume Institute, courtesy of co-chair Gap.

Taking a page from her Princess Diaries days, is perfectly regal in her embellished nude tulle Valentino gown, Ferragamo clutch and Bulgari jewels.

Who needs a gown when you look this hot in your mini? The leggy makes the most of her tan in her turquoise Marchesa minidress and almost 200 carats of Lorraine Schwartz diamond jewelry.

The super-couple (and new parents) are picture perfect in a daring black leather Alexander Wang minidress for her and a classic Tom Ford tuxedo for him.

glows in her beaded blush Stella McCartney gown and matching Casadei platform pumps, finished with Fred Leighton diamond and moonstone jewels.

She may not play a vampire in the Twilight saga, but the marcel-waved takes a trip to the dark side in her Chanel Haute Couture taffeta gown, Chanel Fine Jewelry and Sergio Rossi pumps.

Less is more for this willowy star, who pairs her subtly shimmering Calvin Klein Collection navy column with a bold gold Neil Lane cuff and cocktail ring.

It’s high drama – and high shine! – for , who pairs her dramatic beaded Marchesa gown with a glittering clutch from the label, sparkling pumps and gleaming Harry Winston diamonds.

Arriving solo, the stays loyal to longtime designer favorite Carolina Herrera in a gilded black gown paired with ’40s Fred Leighton jewels.

Pinning up her blonde locks into retro curls, swans down the red carpet in her beaded Valentino gown and Van Cleef & Arpels diamonds.

The ageless oozes sex appeal in her asymmetrical, molten silver gown, marigold clutch and jeweled cuffs – all by Lanvin.

Escorted by the designer himself, the evening’s makes a beaming entrance in her custom navy silk organza gown, Jimmy Choo sandals and her own jewelry, including Lorraine Schwartz jade and diamond bangles.

Tweeting “On the way to the Met Ball, ready to light this party up…,” the proves she meant that quite literally in her glow-in-the-dark CuteCircuit gown and Lorraine Schwartz pink sapphire jewelry.

Continuing to act as Dior’s red carpet ambassador, the French beauty shines in a silver sequin Haute Couture gown from the brand, along with Dior shoes and clutch.

Talk about pretty in pink! The Oscar winner is a standout in her custom fuchsia Oscar de la Renta gown, gold Jimmy Choo sandals, Fred Leighton gold jewelry and a Roger Vivier clutch.

After hitting the red carpet with Chief Creative Officer Christopher Bailey, the face of Burberry does the label proud, wearing it head to toe from her custom shoes to her one-shoulder white gown to her box clutch.

Tom Ford tuxedo-clad Schreiber provides the perfect black-and-white foil to partner vibrant raspberry Stella McCartney gown and Fred Leighton ruby jewelry.

The fashion risk-taker eschews a gown for a full-skirted, teal lace Proenza Schouler minidress and antique Fred Leighton jewels.

The always-stylish couple coordinate in sleek Calvin Klein Collection, with Fred Leighton antique jewels for her.

Tina, is that you? Fey picks an atypically edgy zip-front Yves Saint Laurent jumpsuit, paired with custom Sergio Rossi pumps and Fred Leighton diamond earrings.

The actress channels another famous Brit, Twiggy, in her mauve, mod, Miu Miu lace dress, Prada peeptoe shoes and Martin Katz jewels.

is angelic in her white Rodarte for Gap embroidered gown with Swarovski crystal pearls, Nicholas Kirkwood for Rodarte heels and Van Cleef & Arpels studs.

Arriving with designer Stella McCartney, proves to be her pal’s best model in her delicate black dress, Fred Leighton jewels and Roger Vivier peeptoe pumps.

The happy couple are perfectly polished in their custom Burberry, with a metallic lace dress and Fred Leighton jewels for and a classic tuxedo for Dancy.

The gets ruffled up in her Diane von Furstenberg strapless gown, set off with a DVF clutch and H. Stern jewelry.

Arriving on the arm of dashing designer Giambattista Valli (not pictured), Dawson shows her softer side in a custom lilac bustier gown and Fred Leighton jewels.

Picking her dress right off the Paris runway of Louis Vuitton, the trendsetter keeps her accessories to a minimum to put the focus on her romantic corset gown.

What’s more dramatic – the Mad Men star’s heavy smoky eye or her black-embellished fuchsia Yves Saint Laurent dress?

Red hot! Washington sizzles in a one-of-a-kind Thakoon for Gap asymmetrical red gown with Tasaki by Thakoon jewelry and Christian Louboutin accessories.

Making for one updated flapper, the actress pairs her feathered Gucci frock with python print tights and tough sandals from the Italian line.

She may be the ultimate diva onstage, but Blige is nothing but lovely in a soft orange J. Mendel gown, VBH clutch, Lorraine Schwartz rose gold earrings and bracelets, and an Ofira diamond ring.

It’s wearable art for Kunis, who dazzles in a tulle Vera Wang gown with a hand appliquéd bodice and Fred Leighton drop earrings.

Looking like the picture of ’50s elegance, the raven-haired star sets off her classic beauty with a red chiffon Jason Wu gown, Cartier jewelry and Christian Louboutin accessories.

The sexy TV star highlights her famous curves in a sky blue L’Wren Scott gown with a feather pin.

Arriving with fiancé Hayden Christensen, is ’50s sweet in head-to-toe Louis Vuitton.

The sultry blooms in a rose print Dolce & Gabbana mermaid gown, Verdura jewels and Brian Atwood pumps.

The Good Wife keeps it sleek and chic in her black Narciso Rodriguez gown and Tiffany & Co. jewels.

The actress is a golden girl in her curve-hugging sequined Michael Kors gown, with accessories by the designer.

The British actress picks a majestic gown from her fellow countrywoman Vivienne Westwood along with dramatic jewels by Solange Azagury-Partridge.