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).
The Amateur
Director O'Brien
2025
Dope Girls
Kate Galloway · (6 episodes)
2025
Paradise
Samantha 'Sinatra' Redmond · (8 episodes)
2025
Janet Planet
Janet
2024
Dream Scenario
Janet Matthews
2023
Blonde
Gladys
2022
Weird: The Al Yankovic Story
Mary Yankovic
2022
With/In Volume 2
2022
With/In Volume 2
(segment "Touching")
2021
Hacks
Dance Mom · (3 episodes)
2021
Mare of Easttown
Lori Ross · (7 episodes)
2021
The Outsider
Glory Maitland · (10 episodes)
2020
Togo
Constance Seppala
2019
Initials S.G.
Jane
2019
Monos
Doctora
2019
Weightless
Janeece
2018
Who We Are Now
Beth
2018
I, Tonya
Diane Rawlinson
2017
Novitiate
Nora Harris
2017
Law & Order True Crime
Jill Lansing · (2 episodes)
2017
From Nowhere
Jackie
2017
Eyewitness
Helen Torrance · (10 episodes)
2016
Sophie and the Rising Sun
Sophie Willis
2016
Black Mass
Marianne Connolly
2015
10,000 Saints
Harriet
2015
The Red Road
Jean Jensen · (12 episodes)
2014
August: Osage County
Ivy Weston
2013
Masters of Sex
Dr. Lillian DePaul · (12 episodes)
2013
Keep the Lights On
Claire
2012
Shadows & Lies
Ann
2010
Brief Interviews with Hideous Men
Sara
2009
The Good Wife
Callie Simko · (2 episodes)
2009
Staten Island
Mary Halverson
2009
Flannel Pajamas
Nicole
2006
Two Weeks
Emily Bergman
2006
The Megan Mullally Show
Self - Guest · (1 episode)
2006
Puccini for Beginners
Samantha
2006
Conviction
Sara Finn · (13 episodes)
2006
The Water Is Wide
Barbara
2006
Her Name Is Carla
Carla
2005
Kinsey
Alice Martin
2004
Little Black Book
Joyce
2004
Seeing Other People
Alice
2004
Tully
Ella Smalley
2002
Presidio Med
Dr. Jules Keating · (16 episodes)
2002
I'm with Lucy
Jo
2002
Speakeasy
Rebecca
2002
Dead Dog
Charity
2001
Law & Order: Criminal Intent
Megan Wheeler · (24 episodes)
2001
Godass
Nancy
2000
The Others
Marian Kitt · (13 episodes)
2000
Passion of Mind
Kim
2000
The Love Letter
Jennifer
1999
Harvest
Lou Yates
1999
Storm of the Century
Katrina Withers · (3 episodes)
1999
Curtain Call
Sandra Hewson
1998
One True Thing
College Student
1998
Long Time Since
Vivian James / Phoebe
1998
Dellaventura
Carol Dakin · (1 episode)
1997
Ally McBeal
Jenny Shaw · (10 episodes)
1997
ER
Jordan · (2 episodes)
1994
Law & Order
Jessie Lucas · (1 episode)
1990
Hallmark Hall of Fame
Barbara · (1 episode)
1951