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 | Poor Boy | 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 | Live in Front of a Studio Audience: The Facts of Life and Diff'rent Strokes | Edna Garrett | 2021-12-07 |
| Movie | Mass | Linda | 2021-10-08 |
| Movie | Rebecca | Mrs. Van Hopper | 2020-10-16 |
| Movie | Cowboys | Faith | 2020-04-15 |
| Movie | Speed of Life | June | 2020-01-10 |
| Series | Lambs of God | Sister Margarita | 2019-07-21 |
| Movie | Tyrel | Silvia | 2018-01-20 |
| Movie | American Animals | Betty Jean 'BJ' Gooch | 2018-06-01 |
| Movie | A Kid Like Jake | Catherine | 2018-06-01 |
| Movie | Hereditary | Joan | 2018-06-07 |
| Movie | Nancy | Betty | 2018-06-08 |
| Series | The Handmaid's Tale | Aunt Lydia / Miss Clements | 2017-04-26 |
| Movie | Hedgehog | Joan | 2017-05-22 |
| Movie | The Great & The Small | Dupre | 2016-03-31 |
| Movie | Collateral Beauty | Sally Price | 2016-12-15 |
| Series | Quarry | Unknown | 2016-09-09 |
| Movie | Captain Fantastic | Abigail Bertrang | 2016-07-08 |
| Movie | Wildlike | Jeanie | 2015-09-25 |
| Movie | Our Brand Is Crisis | Nell | 2015-09-11 |
| Series | True Detective | Betty Childress | 2014-01-12 |
| Movie | The Discoverers | Patti | 2014-05-16 |
| Series | Olive Kitteridge | Bonnie Newton | 2014-11-02 |
| Series | The Leftovers | Patti Levin | 2014-06-29 |
| Movie | St. Vincent | Shirley | 2014-10-09 |
| Movie | The Drop | Dottie | 2014-09-12 |
| Movie | Big Driver | Ramona | 2014-10-18 |
| Movie | Side Effects | Mrs. Taylor | 2013-02-07 |
| Movie | Gimme Shelter | Kathy | 2013-10-17 |
| Movie | Compliance | Sandra | 2012-08-23 |
| Movie | Bachelorette | Victoria Archer | 2012-01-23 |
| Movie | Lost Revolution | Glenn | 2011-02-01 |
| Movie | Coming Up Roses | Lynne | 2011-09-23 |
| Movie | The Art of Getting By | Mrs. Grimes | 2011-06-17 |
| Movie | Taking Chance | Gretchen | 2009-09-21 |
| Movie | The Toe Tactic | Honey Woman | 2009-01-29 |
| Movie | The Informant! | Kate Medford | 2009-09-18 |
| Movie | The Babysitters | Tammy Lyner | 2008-05-09 |
| Movie | Familiar Strangers | 2008-01-01 | |
| Movie | Marley & Me | Dr. Platt | 2008-12-25 |
| Movie | Goodbye Baby | Terri | 2007-03-12 |
| Movie | Alice Upside Down | Aunt Sally | 2007-10-06 |
| Movie | The Living Wake | Librarian | 2007-06-06 |
| Movie | Gardener of Eden | Ma Harris | 2007-04-26 |
| Movie | I Believe in America | Glenn | 2007-07-02 |
| Movie | Saving Shiloh | Louise Preston | 2006-04-05 |
| Movie | Flags of Our Fathers | Mrs. Strank | 2006-10-19 |
| Movie | The Thing About My Folks | Linda | 2005-06-02 |
| Series | Law & Order: Trial by Jury | Unknown | 2005-03-03 |
| Movie | The Notorious Bettie Page | Edna Page | 2005-09-14 |
| Series | The Jury | Unknown | 2004-06-08 |
| Movie | Garden State | Olivia | 2004-07-28 |
| Series | House | Mother Superior | 2004-11-16 |
| Movie | The Manchurian Candidate | Congresswoman Beckett | 2004-07-30 |
| Movie | The Forgotten | Eileen the Accountant | 2004-09-24 |
| 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 | Family Law | Unknown | 1999-09-20 |
| Series | Freaks and Geeks | Cookie Kelly | 1999-09-25 |
| Series | Law & Order: Special Victims Unit | Lillian Siefeld | 1999-09-20 |
| Series | Third Watch | Unknown | 1999-09-23 |
| 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 |
| Series | Chicago Hope | Unknown | 1994-09-18 |
| Movie | It Could Happen to You | Carol | 1994-07-16 |
| Series | Touched by an Angel | Unknown | 1994-09-21 |
| 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 |