Ann Dowd is an American actress. She decided to become an actress while a premed student at the College of the Holy Cross in Worcester, Massachusetts. She graduated in 1978 and went on to study at The Theatre School at DePaul University. In 1993 she won the Clarence Derwent Award for her performance in the play Candida. She has appeared in television shows including House, The X-Files, Third Watch and Law & Order: Special Victims Unit. Films Dowd has appeared in include Lorenzo's Oil, Philadelphia, Apt Pupil, Garden State and Flags of Our Fathers.
| Series | The Testaments | Aunt Lydia | 2026 |
| Movie | The Friend | Marjorie | 2025-03-28 |
| Movie | The Exorcist: Believer | Nurse Ann Brooks | 2023-10-04 |
| Movie | The Independent | Patricia Turnball | 2022-11-02 |
| Movie | Mass | Linda | 2021-10-08 |
| Movie | Live in Front of a Studio Audience: The Facts of Life and Diff'rent Strokes | Edna Garrett | 2021-12-07 |
| Movie | Speed of Life | June | 2020-01-10 |
| Movie | Cowboys | Faith | 2020-04-15 |
| Movie | Rebecca | Mrs. Van Hopper | 2020-10-16 |
| Series | Lambs of God | Sister Margarita | 2019-07-21 |
| Movie | Nancy | Betty | 2018-06-08 |
| Movie | Hereditary | Joan | 2018-06-07 |
| Movie | Tyrel | Silvia | 2018-01-20 |
| Movie | A Kid Like Jake | Catherine | 2018-06-01 |
| Movie | American Animals | Betty Jean 'BJ' Gooch | 2018-06-01 |
| Series | The Handmaid's Tale | Aunt Lydia / Miss Clements | 2017-04-26 |
| Movie | Hedgehog | Joan | 2017-05-22 |
| Movie | Captain Fantastic | Abigail Bertrang | 2016-07-08 |
| Movie | The Great & The Small | Dupre | 2016-03-31 |
| Movie | Collateral Beauty | Sally Price | 2016-12-15 |
| Series | Quarry | Unknown | 2016-09-09 |
| Movie | Wildlike | Jeanie | 2015-09-25 |
| Movie | Our Brand Is Crisis | Nell | 2015-09-11 |
| Movie | The Discoverers | Patti | 2014-05-16 |
| Series | True Detective | Betty Childress | 2014-01-12 |
| Series | The Leftovers | Patti Levin | 2014-06-29 |
| Movie | St. Vincent | Shirley | 2014-10-09 |
| Series | Olive Kitteridge | Bonnie Newton | 2014-11-02 |
| Movie | Big Driver | Ramona | 2014-10-18 |
| Movie | The Drop | Dottie | 2014-09-12 |
| Movie | Gimme Shelter | Kathy | 2013-10-17 |
| Movie | Side Effects | Mrs. Taylor | 2013-02-07 |
| Movie | Bachelorette | Victoria Archer | 2012-01-23 |
| Movie | Compliance | Sandra | 2012-08-23 |
| Movie | Lost Revolution | Glenn | 2011-02-01 |
| Movie | The Art of Getting By | Mrs. Grimes | 2011-06-17 |
| Movie | Coming Up Roses | Lynne | 2011-09-23 |
| Movie | The Toe Tactic | Honey Woman | 2009-01-29 |
| Movie | The Informant! | Kate Medford | 2009-09-18 |
| Movie | Taking Chance | Gretchen | 2009-09-21 |
| Movie | Familiar Strangers | 2008-01-01 | |
| Movie | The Babysitters | Tammy Lyner | 2008-05-09 |
| Movie | Marley & Me | Dr. Platt | 2008-12-25 |
| Movie | Gardener of Eden | Ma Harris | 2007-04-26 |
| Movie | Goodbye Baby | Terri | 2007-03-12 |
| Movie | The Living Wake | Librarian | 2007-06-06 |
| Movie | Alice Upside Down | Aunt Sally | 2007-10-06 |
| Movie | I Believe in America | Glenn | 2007-07-02 |
| Movie | Flags of Our Fathers | Mrs. Strank | 2006-10-19 |
| Movie | The Thing About My Folks | Linda | 2005-06-02 |
| Movie | The Notorious Bettie Page | Edna Page | 2005-09-14 |
| Series | Law & Order: Trial by Jury | Unknown | 2005-03-03 |
| Series | The Jury | Unknown | 2004-06-08 |
| Movie | Garden State | Olivia | 2004-07-28 |
| Movie | The Forgotten | Eileen the Accountant | 2004-09-24 |
| Movie | The Manchurian Candidate | Congresswoman Beckett | 2004-07-30 |
| Series | House | Mother Superior | 2004-11-16 |
| Movie | Lucy | DeDe | 2003-05-04 |
| Series | Law & Order: Criminal Intent | Unknown | 2001-09-30 |
| Series | The Division | Unknown | 2001-01-07 |
| Movie | Baby | Ms. Minifred | 2000-10-08 |
| Movie | Shiloh 2: Shiloh Season | Louise Preston | 1999-07-02 |
| Series | Providence | Unknown | 1999-01-08 |
| Series | Judging Amy | Unknown | 1999-09-19 |
| Series | Third Watch | Unknown | 1999-09-23 |
| Series | Freaks and Geeks | Cookie Kelly | 1999-09-25 |
| Series | Law & Order: Special Victims Unit | Lillian Siefeld | 1999-09-20 |
| Series | Family Law | Unknown | 1999-09-20 |
| Movie | Apt Pupil | Monica Bowden | 1998-10-23 |
| Movie | All Over Me | Anne | 1997-04-25 |
| Series | Nothing Sacred | Sister Mo | 1997-09-18 |
| Movie | Shiloh | Louise Preston | 1996-11-30 |
| Movie | Kingfish: A Story of Huey P. Long | Rose Long | 1995-03-18 |
| Movie | Bushwhacked | Mrs. Patterson | 1995-08-04 |
| Movie | It Could Happen to You | Carol | 1994-07-16 |
| Series | Touched by an Angel | Unknown | 1994-09-21 |
| Series | Chicago Hope | Unknown | 1994-09-18 |
| Movie | Philadelphia | Jill Beckett | 1993-12-22 |
| Series | The X-Files | Unknown | 1993-09-10 |
| Movie | Lorenzo's Oil | Pediatrician | 1992-12-30 |
| Movie | Green Card | Peggy | 1990-12-23 |
| Series | Law & Order | Dorothy Baxter | 1990-09-13 |
| Series | North and South | Maureen | 1985-11-03 |