Lena Dunham Is Starstruck by Sally Field at Golden Globes Afterparty

Zosia Mamet, Lena Dunham and Allison Williams

Jason LaVeris/FilmMagic

updated 08/25/2015 AT 8:16 PM ET

originally published 01/14/2013 AT 8:00 PM ET

You go, Girls!

After winning two Golden Globes on Sunday, Lena Dunham beamed while attending HBO’s Golden Globe party at Circa 55 Restaurant in Beverly Hills.

The Girls creator – who wore an eggplant-colored Zac Posen gown during the awards – seemed “too excited” to make it through the line of waiting reporters, an onlooker tells PEOPLE.