Kelly MacDonald & Michael Shannon: 'Boardwalk Empire' Premiere!

Kelly MacDonald and Gretchen Mol pose for a picture at the Boardwalk Empire season four premiere held at the Ziegfeld Theater on Tuesday (September 3) in New York City.

The two ladies were joined at the event by co-stars Michael Shannon, Steve Buscemi, Jack Huston, Patricia Arquette, and executive producer Martin Scorsese.

The fourth season of Boardwalk Empire is set to premiere on September 8, with the season finale set to air on November 24.

Inside the party, 20s era showgirls hung from the ceiling while pouring champagne!

FYI: Kelly is carrying an Edie Parker clutch. Patricia is wearing a Badgley Mischka dress and Danielle Queller earrings.

30+ pictures inside of Kelly MacDonald and others at the Boardwalk Empire season four premiere in NYC…