Schmidt made her film debut in the 2010 documentary '' Client 9 : The Rise and Fall of Eliot Spitzer '' , portraying a prostitute who refused to appear on camera . She had parts that year on NBC 's '' Mercy '' , and in the play '' Phantom Killer '' , about the 1946 Texarkana Moonlight Murders . Schmidt made her feature film debut in '' Our Idiot Brother '' , a comedy-drama starring Paul Rudd , Elizabeth Banks , and Zooey Deschanel , which premiered at the 2011 Sundance Film Festival . She was also cast in the play '' Be a Good Little Widow '' at Ars Nova , and in Teresa Deevy 's '' Temporal Powers '' at Manhattan 's Mint Theater in 2011 . In 2012 , Schmidt became a regular on the HBO Prohibition-era crime drama , '' Boardwalk Empire '' , playing Julia Sagorsky . She also played Ruth Atkins in the Eugene O’Neill play , '' Beyond the Horizon '' , at the Irish Repertory Theatre
2011 Sundance Film Festival
2011 Sundance Film Festival
Wrenn Schmidt