Biography
Mary Catherine McCormack is an American actress. She has had leading roles as Justine Appleton on the series Murder One (1995–1997), as Deputy National Security Adviser Kate Harper on The West Wing (2004–2006), as Deputy U.S. Marshal Mary Shannon on In Plain Sight (2008–2012), and as Peggy on the comedy series The Kids Are Alright (2018–2019).
Known For
Complete Filmography
Vicious
2025
A young woman must spend the night fighting for her existence as she slips down a disturbing rabbit hole contained inside a mysterious gift from a lat...
National Memorial Day Concert
2023
as Self
On the eve of Memorial Day, a star-studded lineup will grace the stage for one of PBS' highest-rated programs. This multi-award-winning television eve...
Unpregnant
2020
as Debra Clarke
A 17-year old Missouri teen discovers she has gotten pregnant, a development that threatens to end her dreams of matriculating at an Ivy League colleg...
Still Laugh-In: The Stars Celebrate
2019
as Self
Hollywood's finest pay tribute to "Rowan and Martin's Laugh-In" for an uncensored and unforgettable celebration at The Dolby Theater.
Treehouse
2019
as Lilith
Celebu-chef Peter Rake escapes a scandal for a weekend at his family’s isolated vacation home, but there are debts to repay and Peter has to learn the...
Drone
2017
as Ellen
Ideologies collide with fatal results when a military drone contractor meets an enigmatic Pakistani businessman.
Alien Code
2017
as Rebecca
After deciphering a message found in a satellite, genius cryptographer Alex Jacobs finds himself being stalked by government agents and otherworldly b...
The Crash
2017
as Sarah Schwab
In the not so distant future, a team of white collar criminals are enlisted by the Federal government to thwart a cyber-attack that threatens to bankr...
An American Girl Story: Maryellen 1955 - Extraordinary Christmas
2016
as Kay Larkin
It's Christmas, 1955 in Daytona Beach, FL, and middle child Maryellen longs to stand out amidst the hustle and bustle of her big family. When Benji, a...
A Country Called Home
2016
as Amanda
Ellie is a 27-year old whose life is far from where she imagined it to be. Filled with annoying friends, a self-involved boyfriend, and a career that ...
Scooby-Doo! WrestleMania Mystery
2014
as Ms. Richards (voice)
The mystery begins when Shaggy and Scooby win tickets to "WrestleMania" and convince the crew to go with them to WWE City. But this city harbors a spo...
Escape from Polygamy
2013
as Leann
Recently-widowed Leann and her 17-year-old daughter Julina move into an isolated polygamous compound, where the freethinking Julina meets like-minded ...
Should've Been Romeo
2012
as Ellen
A self-centered, middle-aged pitchman for a potato chip company loses his job and his livelihood just as his octogenarian grandfather is dropped on hi...
The Unprofessional
2012
as Hilary Pfeiffer-Dunne
Hilary Pfeiffer-Dunne, a high-powered executive who, having dominated the corporate America for years, now faces the biggest challenge of her life whe...
1408
2007
as Lilly Enslin
A man who specializes in debunking paranormal occurrences checks into the fabled room 1408 in the Dolphin Hotel. Soon after settling in, he confronts ...
For Your Consideration
2006
as Pilgrim Woman
The possibility of Oscar gold holds the cast and crew of an independent film in its grip after the performance of its virtually unknown, veteran star ...
Right at Your Door
2006
as Lexi
A dirty bomb goes off in Los Angeles, jamming freeways and spreading a toxic cloud.
Madison
2005
as Bonnie McCormick
In 1971, air-conditioner repairman and boat enthusiast Jim McCormick entertains his desire to 'go down' as a legend in the record books when the Gold ...
Dickie Roberts: Former Child Star
2003
as Grace Finney
TV child star of the '70s, Dickie Roberts is now 35 and parking cars. Craving to regain the spotlight, he auditions for a role of a normal guy, but th...
Full Frontal
2002
as Linda
A day in the life of a group of men and women in Hollywood, in the hours leading up to a friend's birthday party.
World Traveler
2002
as Margaret
After hitting the road a man encounters characters that make him realize the importance of family.
K-PAX
2001
as Rachel Powell
Prot is a patient at a mental hospital who claims to be from a far away planet. His psychiatrist tries to help him, only to begin to doubt his own exp...
High Heels and Low Lifes
2001
as Frances
A nurse eavesdrops with a friend on a cell phone conversation that describes a bank heist. She and the friend then conspire to blackmail the robbers f...
BigLove
2001
as Phoebe
When Samson and Delilah pack up for school like dutiful children, Mom and Dad employ their own adolescent diversions to try to keep them at home. A wh...
East of A
2000
as Daphne
An aspiring singer, a troubled rich boy, and an ex-seminarian share an apartment in the East Village in this story dealing with AIDS, sexuality, and l...
Gun Shy
2000
as Gloria Nesstra
Legendary undercover DEA agent Charlie Mayough has suddenly lost his nerves of steel. On the verge of a career-induced mental breakdown, and in comple...
The Broken Hearts Club: A Romantic Comedy
2000
as Anne
A close-knit group of gay friends share the emotional roller coster of life, relationships, the death of friends, new beginnings, jealousy, fatherhood...
Other Voices
2000
as Anna
Phil and Anna are a young, married couple, who begin to suspect one other of an affair. When a shady private investigator gets involved in their relat...
The Big Tease
1999
as Monique
Thinking he's competing in Los Angeles' hot Platinum Scissors contest, Scottish hairstylist Crawford leaves Glasgow with a film crew to capture the ev...
Mystery, Alaska
1999
as Donna Biebe
In Mystery, Alaska, life revolves around the legendary Saturday hockey game at the local pond. But everything changes when the hometown team unexpecte...
True Crime
1999
as Michelle Ziegler
Boozer, skirt chaser, careless father. You could create your own list of reporter Steve Everett's faults but there's no time. A San Quentin Death Row ...
Harvest
1999
as Agent Becka Anslinger
A DEA agent and a local sheriff have to wrestle with their consciences as they start raids on local farmers, who have started growing marijuana simply...
Getting to Know You
1999
as Leila Lee
A chance encounter alters a teenage girl's perception of herself and her outlook on life.
The Alarmist
1998
as Sally
Young Tommy Hudler decides to become a security systems salesman, and is an instant success. Everything seems to be going great until he discovers the...
54
1998
as New Year's Eve Wife (uncredited)
Shane O'Shea, a Jersey boy with big dreams, crosses the river in hopes of finding another, more exciting life at Studio 54. When Steve Rubell, the mas...
Deep Impact
1998
as Andrea Baker
A seven-mile-wide space rock is hurtling toward Earth, threatening to obliterate the planet. Now, it's up to the president of the United States to sav...
Fathers' Day
1997
as Virginia Farrell (uncredited)
A woman cons two old boyfriends into searching for her runaway son by convincing both that they are the boy's father.
Private Parts
1997
as Alison Stern
The life and career of shock-jock superstar Howard Stern is recounted from his humble beginnings to his view from the top. Possessing a desire to be a...
Colin Fitz
1997
as Moira
Two security guards, Paul and Grady, are hired to guard the grave of dead rock legend, Colin Fitz. Through the course of one bizarre night, these two ...
Backfire!
1995
as Sarah Jackson
Just as Jeremy Jackson attempts to become the first male firewoman in New York, fires begin mysteriously erupting from toilets all over the City and F...
Miracle on 34th Street
1994
as Myrna Foy
Six-year-old Susan Walker has doubts about childhood's most enduring miracle—Santa Claus. Her mother told her the secret about Santa a long time ago, ...