'Girls' Season 3 premiere: Allison Williams parties with dad Brian Williams

allison-brian-williams-girls-gi.jpgThe stars were out in full force at Jazz at Lincoln Center in NYC to celebrate the upcoming Season 3 premiere of "Girls" on Monday (Jan. 6). The titular girls ( Lena Dunham, Allison Williams, Zosia Mamet and Jemima Kirke) all stunned on the red carpet, but they weren't alone. Take a look at who partied the night away in honor of the hit HBO series, including Williams' famous father, Brian Williams.

jemima-lena-allison-zosia-girls-premiere-gi.jpgJoining the fearless foursome were a handful of new girls guest-starring this season: Danielle Brooks ( "Orange Is the New Black"), Amy Schumer and Gaby Hoffman.

danielle-brooks-amy-schumer-gabby-hoffman-girls-gi.jpgIt wasn't all a #GIRLSnight, however. The guys of the cast were well-represented by Alex Karpovsky, Andrew Rannells and Colin Quinn.

alex-karpovsky-andrew-rannells-colin-quinn-girls-gi.jpgBut it wasn't just all "Girls" stars, either. Joel McHale, Cristin Milioti and Natasha Lyonne were on hand, as well.

joel-mchale-cristin-milioti-natasha-lyonne-girls-gi.jpg Once inside the party, things got a little weird. Dunham found herself in this lovefest with Rannells and HBO EVP Casey Bloys.

lena-andrew-hug-girls-gi.jpgAnd executive producer Judd Apatow posed on a fake subway train. Because why not?

judd-apatow-subway-girls-gi.jpg"Girls" returns for Season 3 on Sunday, Jan. 12 at 10 p.m. on HBO.
Photo/Video credit: Getty Images