
Julianne Nicholson (born July 1, 1971) is an American actress. She is best known for her roles in the films August: Osage County (2013) and Blonde (2022), as well as the television series Law & Order: Criminal Intent (2006–2009), Masters of Sex (2013–2014), Eyewitness (2016), and Mare of Easttown (2021), the lattermost of which earned her a Primetime Emmy Award. Nicholson's other notable credits include Tully (2000), Ally McBeal (2001–2002), Kinsey (2004), Conviction (2006), Boardwalk Empire (2011–2013), Black Mass (2015), I, Tonya (2017), Togo (2019), and The Outsider (2020).

Law & Order
TV • 1990

Law & Order: Criminal Intent
TV • 2001

The Good Wife
TV • 2009

ER
TV • 1994

Paradise
TV • 2025

RuPaul's Drag Race
TV • 2009

Boardwalk Empire
TV • 2010

Masters of Sex
TV • 2013

Hacks
TV • 2021

Ally McBeal
TV • 1997

The Megan Mullally Show
TV • 2006

The Outsider
TV • 2020

Conviction
TV • 2006

The Amateur
MOVIE • 2025

Mare of Easttown
TV • 2021

Presidio Med
TV • 2002

Blonde
MOVIE • 2022

Storm of the Century
TV • 1999