Acting · Chicago, Illinois, USA · Born July 14, 1970
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.
MovieHailey Dean Mysteries: A Will to Kill
2018
as Olivia
MovieThe Hatred
2017
as Miriam
TVTogetherness
2015
as Lindsay
MovieThe Bling Ring
2013
as Vegas Detective (Female)
TVMonday Mornings
2013
MovieThe Artist
2011
as Admiring Woman
TVPast Life
2010
as Sharon Moody
MovieThe Haunting of Molly Hartley
2008
as Dr. Emerson
TVEli Stone
2008
as Katie Bochner
TVPrivate Practice
2007
as Kathleen
TVSaving Grace
2007
as Heather
MovieMystery Woman: In the Shadows
2007
as Cassie Hillman
MovieMystery Woman: Redemption
2006
as Cassie Hillman
MovieMystery Woman: Oh Baby
2006
as Cassie Hillman
MovieMystery Woman: Wild West Mystery
2006
as Cassie Hillman
MovieMystery Woman: At First Sight
2006
as Cassie Hillman
MovieMystery Woman: Game Time
2005
as Cassie Hillman
MovieMystery Woman: Vision of a Murder
2005
as Cassie Hillman
TVGrey's Anatomy
2005
as Kate Carlson
MovieMystery Woman: Sing Me a Murder
2005
as Cassie Hillman
MovieMystery Woman: Snapshot
2005
as Cassie Hillman
MovieMystery Woman: Mystery Weekend
2005
as Cassie Hillman
MovieA Carol Christmas
2003
as Roberta
TVCold Case
2003
as Julie Vera
TVWithout a Trace
2002
as Celia Cutler
TVLaw & Order: Criminal Intent
2001
as Claudia Duffy
TVThe Guardian
2001
as Suzanna Clemons
MovieSleep Easy, Hutch Rimes
2000
as Holly Proudfit
TVCSI: Crime Scene Investigation
2000
as Linley Parker
MovieThe Darkling
2000
as Marla Obold
TVThe Huntress
2000
MovieThe Big Tease
1999
as Betty Fuego
TVThe West Wing
1999
as Ellie Bartlet
TVJudging Amy
1999
as Christy Wolinsky
MovieJakob the Liar
1999
as Rosa Frankfurter
MovieGoodbye Lover
1999
as Newscaster
TVSports Night
1998
as Holly
TVMore Tales of the City
1998
as Mona Ramsey
MovieBreast Men
1997
as Upset Lady at the Convention (uncredited)
MovieKiss & Tell
1997
as Shelly
MovieThe Long Way Home
1997
as (voice)
MovieSuicide Kings
1997
as Jennifer
MovieRunaway Car
1997
as Jenny Todd
MovieGeorge B.
1997
as Angela
MovieJohns
1996
as Prostitute
MovieThe American President
1995
as Beth Wade
MoviePower of Attorney
1995
as Maria
MovieSawbones
1995
as Jenny Sloan
MovieFloundering
1994
as Gal
TVChicago Hope
1994
as Gloria McKinnon
MovieAirheads
1994
as Suzzi
MovieBaby Brokers
1994
as Leeanne Dees
MovieRed Shoe Diaries 3: Another Woman's Lipstick
1993
as Trudy (archive footage)
MovieThe Saint of Fort Washington
1993
as Tamsen, la fille de Rosario
MovieTwenty Bucks
1993
as Bank Teller
TVTales of the City
1993
TVSinatra
1992
as Mia Farrow
TVRed Shoe Diaries
1992
as Trudy
MovieLittle Noises
1992
as Dolores
MovieWild Orchid II: Two Shades of Blue
1991
as Blue McDonald
MovieBed & Breakfast
1991
as Cassie
TVTales from the Crypt
1989
as Stella Bishop
MovieLost Angels
1989
as Merilee
MovieTucker: The Man and His Dream
1988
as Marilyn Lee
MovieLicense to Drive
1988
as Natalie Anderson
MovieOne More Saturday Night
1986
as Karen Lundahl
TVAmerican Playhouse
1982
as Polly Stockman
