1 of 41
DAKOTA FANNING & ELIZABETH OLSEN
The young actresses redefine our idea of biker chick style as they pedal through N.Y.C. in funky retro getups (Olsen in Element Eden shorts) on the set of their film Very Good Girls.
2 of 41
Maternity leave? Not for this busy , who puts her growing bump to work in a polka-dot smock dress, worn with a cognac cross-body, to film The Devil’s Knot.
3 of 41
Another one of America’s Sweethearts pregnant? Don’t plan the baby shower just yet – the belly is strictly a prop for her movie About Time, filming in London.
4 of 41
Yeah, we did a double take too. The Aussie transforms into Princess Diana for a film about the royal’s final two years, now filming in Croatia. Among Naomi’s many look-alike ensembles, the star sports this golden dress and triple-strand necklace to recreate a moment at the Royal Opera House.
5 of 41
Cleopatra, comin’ atcha! continues her transformation into Elizabeth Taylor for the TV movie Liz & Dick, this time in L.A. wearing an Egyptian ensemble straight out of Taylor’s legendary flop.
6 of 41
KEIRA KNIGHTLEY & ADAM LEVINE
Well, Adam’s questionable mustache is gone, but in its place is quite the beard. We’ll forgive him since it’s for a movie, Can a Song Save Your Life?, being shot in N.Y.C. with .
7 of 41
Looking particularly well-suited to the part of police officer, the rom-com queen is all-business in her pantsuit and briefcase while filming buddy cop movie The Heat in Boston.
8 of 41
Also filming Can a Song Save Your Life? in N.Y.C., the young actress shows her range and toughens up in layered necklaces, a denim mini and torn tights.
9 of 41
One of 2011’s busiest actresses shows no signs of slowing down. She films The Disappearance of Eleanor Rigby in N.Y.C. clad in a blue romper and black flats, plus a cropped do.
10 of 41
The takes a cheerful walk on the wild side in a printed button-down, high-waisted teal trousers and oversize hoops (under an animal-print umbrella) in between scenes of Blood Ties in N.Y.C.
11 of 41
After transforming into Elizabeth Taylor , Liz and Dick’s is barely recognizable in a fierce one-piece, glamorous shades and a brunette wig while filming in L.A.
12 of 41
ANDY SAMBERG & WILL FORTE
What brings these former Saturday Night Live costars together in Boston? A hilarious car washing scene – complete with awkwardly tiny uniforms! – for the upcoming sequel to Grown Ups. We’ll be lining up outside the theater.
13 of 41
Meanwhile, this Grown Ups 2 lives up to the movie’s title in a sophisticated skirt suit (though her between-scenes shearling boots feel awfully youthful) while on location in Boston.
14 of 41
Black Swan this is not! hits the Malibu, Calif., sand in a summery dress topped with a sweater and beachy waves alongside her Knight of Cups costar Christian Bale.
15 of 41
Normally a red carpet standout, manages to blend in with the crowd while shooting Labor Day in Boston, thanks to her casual daytime ensemble.
16 of 41
Duty – and some seriously ’70s attire! – calls for , who gets back into the groove on the New Orleans set of Empire State after popping the question.
17 of 41
MILA & CLIVE
Here comes the bride – from a different decade! On the N.Y.C. set of Blood Ties, the dons a retro romantic white dress complete with daisy adornments and a mauve-suited groom.
18 of 41
Also flirting with fashion of the past in a poppy pillow hat and matching overcoat, Glee’s steps into Rachel Berry mode – and her signature knee-highs! – on location in the Big Apple.
19 of 41
Who’s the movie star? Going undercover and monochromatic in a billowing jumpsuit with glamorously oversize shades and hat, the newly blonde bombshell is barely recognizable during filming of Better Living Through Chemistry in Baltimore.
20 of 41
LENA, ZOSIA & JEMIMA
These lucky and well-dressed Girls literally have an assortment of stylish duds at their fingertips while shooting their HBO series on an N.Y.C. stoop.
21 of 41
Before heating up Cannes, hid her famous features in pastel layers topped off with a brown wig for The Railway Man in Scotland.
22 of 41
With his helmet in hand, the looks revved up on set in Toronto for his new thriller An Enemy.
23 of 41
It’s a far cry from her Avengers catsuit, but the looks just as sexy in a sleeveless blouse, curve-hugging pencil skirt and nude pumps on the L.A. set of Hitchcock.
24 of 41
On the way to her next Glee scene in L.A., not even Jayma’s whipped-cream-topped beverage could be as sweet as her yellow-and-navy outfit, featuring a white-piped and gold-buttoned shrunken blazer, bow-tied blouse and polka-dot skirt.
25 of 41
In a skin-baring outfit worthy of Coachella, the gets in touch with her inner rebel, wearing a moto jacket, jean cutoffs and strappy stilettos to play a gang member in The Bling Ring in Venice Beach, Calif.
26 of 41
Life’s just peachy for the New Girl starlet, who shoots the show along the Santa Monica shore clad in another adorable costume: this time, a blush strapless gown with a petal-tiered skirt.
27 of 41
Run, Adam, run! Maroon 5’s leading – and newly single! – man makes a mad-yet-stylish dash in L.A. with an unidentified damsel in distress for the band’s new music video.
28 of 41
Mixing a silver frock with a lime leopard cardigan, a rainbow-and-hearts belt and neon orange pumps might not work for most, but it looks just right on the Carrie Diaries star in N.Y.C.
29 of 41
Are those jorts from his Marky Mark days?! Dressing up his denim duds with a tie and bright white high-tops, the jacked actor continues his parade of throwback fashions while shooting Pain and Gain in Miami.
30 of 41
VANESSA WILLIAMS & EVA LONGORIA
This bride doesn’t look so blissful! With her flower-topped veil trailing behind her Kevan Hall White Label gown, the Desperate Housewives actress runs off with her purple-clad in L.A.
31 of 41
32 of 41
Bundling up in a Canada Goose jacket between scenes of Kill Your Darlings in N.Y.C., costar gives a sneak peek at her retro-chic ensemble, complete with a head scarf and round shades.
33 of 41
Is she competing for the title of queen bee? As Gossip Girl’s Serena, lightens up from the waist down with a black-and-yellow color-block trench, a periwinkle clutch and pink pumps while shooting in the Big Apple.
34 of 41
Showing less skin than usual in a summery jumpsuit with strategic slits, poses pretty on the L.A. set of Coldplay’s “Princess of China” music video (she’s collaborating on their album).
35 of 41
While his Spring Breakers costars are looking pretty in bright bikinis, there’s nothing cute about the , on location in St. Petersburg, Fla., in cornrows, a goatee, an island shirt and baggy pants.
36 of 41
For the Sex and the City prequel TV series The Carrie Diaries, AnnaSophia models signature Carrie style, working a cocktail frock with a green denim jacket – and skyscraper cage heels, natch! – on the streets of N.Y.C.
37 of 41
While brother is traveling the globe for The Hunger Games, Chris is ready for the cameras to roll, suiting up as Formula 1 race car driver James Hunt on the London set of Rush.
38 of 41
A colorful sheath and sunny coat (not to mention a multistrand beaded necklace, a chain-strap purse and Mary Jane heels) earn Blair Waldorf’s approval, as the accessorized-to-the-max actress gets ready for her next take in Manhattan.
39 of 41
It takes a very good makeup artist to make this – in Thailand filming his latest flick, Only God Forgives – look cringe-worthy.
40 of 41
The actress adds some length to her locks – and hemline – for a look that’s almost as mysterious as the untitled Diablo Cody movie she’s filming in New Orleans.
41 of 41