Looks of the Week

At the If I Stay book signing, Chloe Grace Moretz gave her gray tailored trousers a high-shine spin with a navy sequined top, both by Jonathan Saunders and metallic pumps.

Nina Dobrev hit the Los Angeles premiere of Let's Be Cops in a multicolor sleeveless beaded Zuhair Murad mini dress, styling her look with muted accessories.

At the UK premiere of Two Days, One Night, Marion Cotillard was clad head to toe in Dior, from her black stretch double-face wool dress (with an embellished neckline) to her ankle-strap heels.

Elisabeth Moss debuted a soft look with a sweet pale blue Chloe dress, pairing it with delicate gold jewelry and metallic Jimmy Choo accessories.

At the New York premiere of TMNT, Megan Fox mastered the art of mixed prints with a black-and-white color-block jacquard bandeau top and an oval-dot jacquard skirt, both by Oscar de la Renta, styling her patterned separates with rings by Melinda Maria and Jamie Wolf, and metallic ankle-strap sandals.

Diane Kruger's effortless style is one to behold. She accessorized her iridescent-accented Christopher Kane shift with pale pink pumps.

Karlie Kloss took a stroll around Soho in a sophisticated ensemble, coupling her collared gray sleeveless dress with a boxy ladylike handbag, a stack of bracelets, and scalloped ankle-strap sandals.

Jamie Chung made quite a statement while out in West Hollywood. She elevated her knotted "Aloha" graphic tank with a white pencil skirt and neutral espadrilles. A printed Elizabeth & James sling bag and red mirrored shades added playful touches.

Jessica Alba's look spelled sophistication, thanks to her ivory wide-leg Max Mara pants that she paired with a dusty blue Alice + Olivia blouse, a black-and-white print tote, Jennifer Fisher jewelry, and neutral wedges.

Julianne Hough modeled a one-shoulder color-block sheath-a design from the new Roland Mouret for Banana Republic collection-at an intimate dinner celebrating the launch. She styled her look with a delicate necklace and black accessories.

Olivia Palermo took Mr. Butler out for a stroll in stark white separates, teaming her relaxed-fit top and midi-length skirt with a skinny white belt, shades from her Westward Leaning collection and lace-up sandals.

Dakota Fanning went for a high-fashion off-duty look wearing sweet MIu Miu separates that she accessorized with Carrera by Jimmy Choo shades, a blue shoulder bag, and color-block Louboutin sling-backs.

Megan Fox struck a fierce pose in a rich embellished jacquard Dolce & Gabbana dress, complete with metallic silver Brian Atwood sandals.

Nina Dobrev tried her hand at print mixology for her appearance on Extra, accessorizing her floral print J. Mendel sheath with black-and-white harlequin print Bionda Castana pumps.

Olivia Palermo defended her title as a street style star with an edgy ladylike ensemble. She paired her leather midi-length skirt with a crisp white Ann Taylor button-down (with an embellished collar) and lace-up sandals.

Leave it to Kim Kardashian to wear couture to a Jimmy Kimmel Live show. She wore a white-and-blush two-toned bustier jumpsuit and a silk teal coat (that she buttoned at the waist) from the Ulyana Sergeenko Couture spring/summer 2014 collection.

Taylor Schilling worked her curves at an OITNB screening in one of Roland Mouret's figure-flattering designs. She pushed color boundaries by coupling the violet sheath with siren-red pumps.

Emmy Rossum fused fashion and function with a cool navy utility DVF jumpsuit, giving it an elevated, ladylike touch with oversize shades, a white carryall, nude strappy heels, and a bold red lip.

Megan Fox was white-hot at the Teenage Mutant Ninja Turtles premiere in an ivory tiered Marc Jacobs micro dress that she styled with a metallic Roger Vivier clutch and strappy Louboutin sandals.

Chloe Grace Moretz made a striking appearance, thanks to her colorful Jonathan Saunders shirtdress and fluoro orange sandals.

Jordana Brewster stepped up her style quotient at the Teenage Mutant Ninja Turtles premiere in a bronze croc-embossed romper, complete with diamond EFFY Jewelry and black stilettos.

Jessica Alba embraced culottes (one of this season’s hottest silhouettes), styling her chambray pair with an ivory floral tank, a nude perforated tote, and lace-up booties.