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Lena Dunham, Zosia Mamet, Allison Williams, and Jemima Kirke are all dressed to impress while attending the fourth season premiere of Girls held at American Museum of Natural History on Monday (January 5) in New York City.

The four actresses were joined by other co-stars Gaby Hoffmann, Andrew Rannells, and Alex Karpovsky.

PHOTOS: Check out the latest pics of Lena Dunham

Orange is the New Black‘s Natasha Lyonne and Edie Falco were also seen hitting the premiere.

It was just announced that Girls has just been renewed for a fifth season by HBO! We are so happy to hear the news!

FYI: Lena is wearing a Creatures of the Wind gown and Irene Neuwirth jewels. Allison is wearing a Monique Lhuillier dress and Eva Fehren jewelry. Zosia is wearing an Alexander McQueen dress, Brian Atwood heels, and jewelry by Jennifer Fisher, Lizzie Mandler, and Selin Kent. Jemima is wearing Sophia Webster shoes and an Edie Parker clutch. Natasha is wearing an Opening Ceremony dress and handbag.

25+ pictures inside of Lena Dunham and Allison Williams at the Girls season four premiere…More Here! »

Lena Dunham and Zosia Mamet are stunning while hitting the red carpet for the third season premiere of their hit show Girls held at Lincoln Center on Monday (January 6) in New York City.

The two gals were joined by their co-stars Allison Williams, Jemima Kirke, Alex Karpovsky, and producer Judd Apatow.

PHOTOS: Check out the latest pics of Lena Dunham

Earlier in the day, Lena met Cameron Diaz while promoting the show on Good Morning America.

Mark your calendars, the third season of Girls premieres on Sunday (January 12) on HBO.

FYI: Lena is wearing a Rochas gown with Jimmy Choo shoes and clutch. Zosia is wearing a Saint Laurent dress and shoes. Allison is wearing Dior.

25+ pictures inside of Lena Dunham and Zosia Mamet attending the Girls premiere…More Here! »

Lena Dunham and Zosia Mamet film scenes for the third season of their HBO comedy series Girls on Friday (May 24) along Classon Avenue in Brooklyn, N.Y.

The day before, Allison Williams was spotted filming scenes in Manhattan with co-star Alex Karpovsky.

Lena recently sounded off on Twitter about the Girls porn parody, This Ain’t Girls XXX.

“Okay, I wracked my brain to articulate why I can’t just laugh off a porn parody of Girls and here are 3 reasons: 1. Because Girls is, at its core, a feminist action while Hustler is a company that markets and monetizes a male’s idea of female sexuality; 2. Because a big reason I engage in (simulated) onscreen sex is to counteract a skewed idea of that act created by the proliferation of porn; 3. Because it grosses me out,” Lena said.

“It’s important to me to be honest about the complexities of having that out in the world. Love, Lena (porn name: Murray Broadway),” she added. More Here! »

Lena Dunham, Allison Williams, Zosia Mamet, and Jemima Kirke pose together at the premiere of HBO’s Girls hosted by The Cinema Society held at the NYU Skirball Center on Wednesday (January 10) in New York City.

The actresses were also joined by their male co-stars including Andrew Rannells, Adam Driver, Christopher Abbott, and Alex Karpovsky!

Lena rocked a Valentino jumpsuit, while Allison stunned in an Altuzarra top and skirt with Giuseppe Zanotti shoes, and Fred Leighton jewels. Jemima looked gorgeous in a vintage Geminola gown.

Also pictured are actress Zoe Kravitz and singer Solange Knowles at the bash.

Be sure to tune in when Girls makes it’s highly anticipated return to HBO on Sunday, January 13th @ 9PM EST!

30+ pictures inside from the Girls premiere… More Here! »