Cast & creator
Nina Siemaszko
Best known for Grey's Anatomy, CSI: Crime Scene Investigation, Law & Order: Criminal Intent
Antonina Jadwiga Siemaszko (born July 14, 1970) is an American actress, best known for her film roles in Little Noises (1991), The Saint of Fort Washington (1993), and for her role as Eleanor Bartlet in The West Wing (2001–2006). Siemaszko was born in Chicago. Her father, Konstanty Siemaszko, was a Polish-born Roman Catholic, and a survivor of the Polish Underground and the Sachsenhausen concentration camp. He escaped to the United Kingdom where he met Nina's mother, Collette McAllister. One of her brothers is actor Casey Siemaszko. Her other brother, Corky, is a writer for the Daily News and a reporter at NBC News. She attended The Theatre School at DePaul University. She played an undercover cop in Reservoir Dogs featured in a scene that wound up on the cutting room floor ensuring that the work became a rare example of a film containing no dialogue delivered by an actress. It was released on DVD. She played Mia Farrow in the CBS miniseries Sinatra. She played the leading role in Wild Orchid II: Two Shades of Blue.
Also known as: Nina Siemazko, Нина Семашко, Антонина Ядвига Семашко, Антонина Семашко, نینا سیماشکو
44
film credits
24
television credits
68
1982–2025 · acting roles
6.4
average across scored titles
Signature credits
Known for
Across film & television
Filmography (68)
Showing 68 of 68 credits
Grey's Anatomy
Kate Carlson
2005
CSI: Crime Scene Investigation
Linley Parker
2000
Law & Order: Criminal Intent
Claudia Duffy
2001
The West Wing
Ellie Bartlet
1999
Chicago Hope
Gloria McKinnon
1994
Without a Trace
Celia Cutler
2002
Cold Case
Julie Vera
2003
American Playhouse
Polly Stockman
1982
Private Practice
Kathleen
2007
Judging Amy
Christy Wolinsky
1999
The Guardian
Suzanna Clemons
2001
Tales from the Crypt
Stella Bishop
1989
Saving Grace
Heather
2007
Red Shoe Diaries
Trudy
1992
Eli Stone
Katie Bochner
2008
Sports Night
Holly
1998
The Paper
2025
The Huntress
2000
Togetherness
Lindsay
2015
The Artist
Admiring Woman
2011
Monday Mornings
2013
Tales of the City
1993
Past Life
Sharon Moody
2010
The Bling Ring
Vegas Detective (Female)
2013
More Tales of the City
Mona Ramsey
1998
Johns
Prostitute
1996
The American President
Beth Wade
1995
Breast Men
Upset Lady at the Convention (uncredited)
1997
Tucker: The Man and His Dream
Marilyn Lee
1988
License to Drive
Natalie Anderson
1988
Jakob the Liar
Rosa Frankfurter
1999
Airheads
Suzzi
1994
Sinatra
Mia Farrow
1992
Twenty Bucks
Bank Teller
1993
Suicide Kings
Jennifer
1997
Wild Orchid II: Two Shades of Blue
Blue McDonald
1991
Goodbye Lover
Newscaster
1999
A Carol Christmas
Roberta
2003
Mystery Woman: Vision of a Murder
Cassie Hillman
2005
The Haunting of Molly Hartley
Dr. Emerson
2008
The Long Way Home
(voice)
1997
The Saint of Fort Washington
Tamsen, la fille de Rosario
1993
Mystery Woman: Wild West Mystery
Cassie Hillman
2006
Mystery Woman: In the Shadows
Cassie Hillman
2007
Sleep Easy, Hutch Rimes
Holly Proudfit
2000
Sawbones
Jenny Sloan
1995
Hailey Dean Mysteries: A Will to Kill
Olivia
2018
Mystery Woman: At First Sight
Cassie Hillman
2006
One More Saturday Night
Karen Lundahl
1986
Lost Angels
Merilee
1989
Mystery Woman: Game Time
Cassie Hillman
2005
Runaway Car
Jenny Todd
1997
Red Shoe Diaries 3: Another Woman's Lipstick
Trudy (archive footage)
1993
Kiss & Tell
Shelly
1997
Mystery Woman: Oh Baby
Cassie Hillman
2006
The Big Tease
Betty Fuego
1999
Mystery Woman: Sing Me a Murder
Cassie Hillman
2005
Mystery Woman: Mystery Weekend
Cassie Hillman
2005
Power of Attorney
Maria
1995
The Hatred
Miriam
2017
Bed & Breakfast
Cassie
1991
Mystery Woman: Snapshot
Cassie Hillman
2005
Mystery Woman: Redemption
Cassie Hillman
2006
The Darkling
Marla Obold
2000
Floundering
Gal
1994
Baby Brokers
Leeanne Dees
1994
George B.
Angela
1997
Little Noises
Dolores
1992