allison brian williams girls gi 'Girls' Season 3 premiere: Allison Williams parties with dad Brian WilliamsThe 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 'Girls' Season 3 premiere: Allison Williams parties with dad Brian WilliamsJoining 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 'Girls' Season 3 premiere: Allison Williams parties with dad Brian WilliamsIt 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 'Girls' Season 3 premiere: Allison Williams parties with dad Brian WilliamsBut 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 'Girls' Season 3 premiere: Allison Williams parties with dad Brian Williams 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 'Girls' Season 3 premiere: Allison Williams parties with dad Brian WilliamsAnd executive producer Judd Apatow posed on a fake subway train. Because why not?

judd apatow subway girls gi 'Girls' Season 3 premiere: Allison Williams parties with dad Brian Williams“Girls” returns for Season 3 on Sunday, Jan. 12 at 10 p.m. on HBO.