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 | 2027 |
| Movie | Poor Boy | 2027 | |
| 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 | Cowboys | Faith | 2020-04-15 |
| Movie | Speed of Life | June | 2020-01-10 |
| Movie | Rebecca | Mrs. Van Hopper | 2020-10-16 |
| Series | Lambs of God | Sister Margarita | 2019-07-21 |
| Movie | American Animals | Betty Jean 'BJ' Gooch | 2018-06-01 |
| Movie | Tyrel | Silvia | 2018-01-20 |
| 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 | Captain Fantastic | Abigail Bertrang | 2016-07-08 |
| Movie | Collateral Beauty | Sally Price | 2016-12-15 |
| Series | Quarry | Unknown | 2016-09-09 |
| Movie | Our Brand Is Crisis | Nell | 2015-09-11 |
| Movie | Wildlike | Jeanie | 2015-09-25 |
| Series | The Leftovers | Patti Levin | 2014-06-29 |
| Movie | The Discoverers | Patti | 2014-05-16 |
| Movie | The Drop | Dottie | 2014-09-12 |
| Series | True Detective | Betty Childress | 2014-01-12 |
| Movie | St. Vincent | Shirley | 2014-10-09 |
| Series | Olive Kitteridge | Bonnie Newton | 2014-11-02 |
| Movie | Big Driver | Ramona | 2014-10-18 |
| Movie | Side Effects | Mrs. Taylor | 2013-02-07 |
| Movie | Gimme Shelter | Kathy | 2013-10-17 |
| Movie | Bachelorette | Victoria Archer | 2012-01-23 |
| Movie | Compliance | Sandra | 2012-08-23 |
| Movie | The Art of Getting By | Mrs. Grimes | 2011-06-17 |
| Movie | Lost Revolution | Glenn | 2011-02-01 |
| 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 | The Babysitters | Tammy Lyner | 2008-05-09 |
| Movie | Familiar Strangers | 2008-11-14 | |
| Movie | Marley & Me | Dr. Platt | 2008-12-25 |
| Movie | Goodbye Baby | Terri | 2007-03-12 |
| Movie | Gardener of Eden | Ma Harris | 2007-04-26 |
| 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 | Saving Shiloh | Louise Preston | 2006-04-05 |
| Movie | Flags of Our Fathers | Mrs. Strank | 2006-10-19 |
| Movie | The Notorious Bettie Page | Edna Page | 2005-09-14 |
| Series | Law & Order: Trial by Jury | Unknown | 2005-03-03 |
| Movie | The Thing About My Folks | Linda | 2005-06-02 |
| 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 | The Division | Unknown | 2001-01-07 |
| Series | Law & Order: Criminal Intent | Unknown | 2001-09-30 |
| Movie | Baby | Ms. Minifred | 2000-10-08 |
| Movie | Shiloh 2: Shiloh Season | Louise Preston | 1999-07-02 |
| Series | Judging Amy | Unknown | 1999-09-19 |
| Series | Providence | Unknown | 1999-01-08 |
| Series | Freaks and Geeks | Cookie Kelly | 1999-09-25 |
| Series | Third Watch | Unknown | 1999-09-23 |
| 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 |
| Series | Nothing Sacred | Sister Mo | 1997-09-18 |
| Movie | All Over Me | Anne | 1997-04-25 |
| 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 | Chicago Hope | Unknown | 1994-09-18 |
| Series | Touched by an Angel | Unknown | 1994-09-21 |
| Series | The X-Files | Unknown | 1993-09-10 |
| Movie | Philadelphia | Jill Beckett | 1993-12-22 |
| Movie | Lorenzo's Oil | Pediatrician | 1992-12-30 |
| Series | Law & Order | Dorothy Baxter | 1990-09-13 |
| Movie | Green Card | Peggy | 1990-12-23 |
| Series | North and South | Maureen | 1985-11-03 |