Week in Red Carpet

Michelle Williams looked darling at the New York premiere of Blue Valentine on Tuesday. Her film made headlines this week after earning an R rating from the MPAA, which had previously slapped the controversial movie with a NC-17 rating. At the premiere, Williams shined in a mini Azzaro dress that sparkled with silver on the top, featured cream ruffles on the bottom, and was tied together with a black bow in the middle. The actress completed her chic ensemble with Charlotte Olympia shoes.

Evan Agostini / AP Photo

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Angelina Jolie broke away from her usual black red carpet ensembles and wowed in winter white at the New York premiere of The Tourist. The actress opted for an angora Alteria Versace gown that featured a thigh-high split, showcasing her white Ferragamo pumps. Her half-up hairstyle revealed stunning earrings from her personal jeweler, Robert Procop.

Rob Kim / Retna

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Country music sweetheart Carrie Underwood also dared to bare leg at the 2010 American Country Awards on Monday. The songstress shined in a George Chakra off-the-shoulder red gown with a thigh-high split that showed off her gold Rene Caovilla heels and matching clutch from the designer.

Elle Driver / Retna

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Typically outrageous pop star Katy Perry revealed her demure side as she accompanied her husband, Russell Brand, at the Los Angeles premiere of The Tempest on Monday in a lilac lace asymmetrical Elie Saab Couture gown. Perry’s look—which also included Elie Saab heels, jewelry by MCL, and a Judith Leiber clutch—was a far cry from the snowman dress she wore for a concert the night before.

Retna

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Fashion designers Narciso Rodriguez and Marc Jacobs attended the 10th Annual Toy Drive at David Barton Gym in New York City on December 10, 2010.

Marc Stamas, FilmMagic / Getty Images

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Though she wears a whole lot of nothing in her latest role in Love and Other Drugs, Anne Hathaway shined in her ensemble at the film’s premiere in Sydney, Australia on Monday. The upcoming Oscar co-host dazzled in this gold-sequined mini dress, designed by Oscar de la Renta.

Don Arnold, WireImage / Getty Images

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While her older sister Dakota has garnered more media attention, all eyes were on Elle Fanning at Tuesday’s Hollywood premiere of Sofia Coppola’s Somewhere, in which Fanning stars as the daughter of a washed-up actor (Stephen Dorff). The 12-year-old actress looked adorable and age-appropriate in this black Valentino cocktail dress, secured with a big bow in the middle. Fanning even wore sparkly Haute Couture Valentino mules with bows affixed in the front to match.

Dan Steinberg / AP Photo

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British beauty Carey Mulligan went bold in this Prabal Gurung dress at the British Independent Film Awards in London on Sunday. The 25-year-old starlet, who earned the Best Actress award for her part in Never Let Me Go, completed her ensemble with a Cartier ring, a Roger Vivier clutch, and peep-toe shoes.

Gareth Cattermole / Getty Images

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At her Africa Outreach Project’s Benefit in New York on Monday, actress Charlize Theron was a class act in her Versace white knee-length dress, which she paired with a cropped, black Stella McCartney blazer. The sophisticated star completed her look with nude strappy sandals, and she auctioned herself off for a good cause: A date with Theron to a L.A. Lakers game went to the highest bidder for an impressive $20,000.

Theo Wargo / Getty Images

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While the Rodarte costumes in Black Swan have garnered a lot of attention, one of the film’s stars, Natalie Portman, honored another designer this week. The actress stepped into a lace black-and-beige Dior number for the fashion house’s cocktail party on Wednesday in New York and posed alongside designer John Galliano.

Dimitrios Kambouris, WireImage / Getty Images

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Although she was plagued with a risqué

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Oscar-nominated actress Amy Adams gets tough in her latest role in David O. Russell’s The Fighter. But at the film’s Hollywood premiere on Monday, Adams looked effortlessly elegant in a nude J. Mendel dress and Irit Design jewels. She added a bright red pout and matching satin Brian Atwood heels for a bold combination.

Jason Buehler / Retna

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Easy A star Emma Stone’s Roksanda Ilicinic color-blocked cocktail dress was adorable, but it was her hair color that drew camera flashes at a charity event for the Trevor Project in Hollywood on Sunday. The born blonde, but well-known red head, went back to her natural shade for her role as Gwen Stacy in the upcoming Spider-Man movie. “I looked in the mirror and said, ‘Oh my God, it’s me again, it’s been so long!’” she told MTV News of her old/new look. But Stone has a long history with hair dye. The actress previously told The Sun, “When I first moved to L.A., I had this agent who thought, because I was blonde, that I only wanted to play cheerleaders. So one day, in a fit of trying to do something different, I just dyed my hair dark brown and got my first role a week later, after which I thought: ‘People are close-minded, man! Like a different hair color changes everything!’”

Paul Redmond, WireImage / Getty Images

Week in Red Carpet

Angelina Jolie shows serious leg. Michelle Williams shines for Blue Valentine. And Natalie Portman does right by Dior. See the stars’ best looks of the week.