Miriam Flynn (born June 18, 1952) is an American voice actress and character actress. She is best known as Cousin Catherine in the National Lampoon's Vacation franchise. As a voice artist, she has been featured in The Land Before Time series, Taz-Mania as the title character's mother, Jean, Poil in The Spooktacular New Adventures of Casper, and Family Guy. She also played Sister Helen on the TV sitcom Grounded for Life and Coop's mom in Megas XLR. She also starred in her own Sitcom Maggie on ABC in 1981.
| Series | Maggie | 2026 | |
| Movie | Self Reliance | Becky Ann | 2024-01-03 |
| Movie | Extracurricular Activities | Mrs. Reed | 2019-01-28 |
| Movie | The Land Before Time XIV: Journey of the Brave | Grandma (voice) | 2016-02-02 |
| Movie | All-Stars | Miriam Carson | 2014-10-15 |
| Movie | Bucky Larson: Born to Be a Star | Debbie Larson | 2011-09-09 |
| Movie | Nowhere to Hide | Priscella | 2009-04-03 |
| Movie | Wieners | Ben's Mom | 2008-06-03 |
| Movie | The Land Before Time XIII: The Wisdom of Friends | Grandma (voice) | 2007-11-27 |
| Movie | The Land Before Time XII: The Great Day of the Flyers | Grandma (voice) (uncredited) | 2006-02-27 |
| Series | Pepper Dennis | Unknown | 2006-04-04 |
| Series | 'Til Death | Unknown | 2006-09-07 |
| Series | Ben 10 | Unknown | 2005-12-27 |
| Movie | The Land Before Time XI: Invasion of the Tinysauruses | Grandma (voice) | 2005-01-11 |
| Series | Grey's Anatomy | Unknown | 2005-03-27 |
| Movie | Fielder's Choice | Rose | 2005-06-18 |
| Series | Desperate Housewives | Unknown | 2004-10-03 |
| Series | Boston Legal | Unknown | 2004-10-03 |
| Movie | The Land Before Time X: The Great Longneck Migration | Grandma (voice) | 2003-12-02 |
| Movie | Christmas Vacation 2: Cousin Eddie's Island Adventure | Catherine Johnson | 2003-12-20 |
| Series | ChalkZone | 2002-03-22 | |
| Series | Ozzy & Drix | Unknown | 2002-09-14 |
| Movie | The Land Before Time IX: Journey to Big Water | Diplodocus Mom / Grandma (voice) | 2002-12-17 |
| Series | Grounded for Life | Unknown | 2001-01-10 |
| Movie | The Land Before Time VIII: The Big Freeze | Grandma (voice) | 2001-12-04 |
| Movie | Man and Cat | Man's Grandma | 2001-11-08 |
| Series | Malcolm in the Middle | Unknown | 2000-01-09 |
| Series | Bull | 2000-08-15 | |
| Movie | Chump Change | Bussler Waitress | 2000-01-01 |
| Movie | The Land Before Time VII: The Stone of Cold Fire | Grandma (voice) | 2000-12-05 |
| Movie | Alvin and the Chipmunks Meet the Wolfman | Principal Milliken (voice) | 2000-08-29 |
| Movie | The Emperor's New Groove | Additional Voices (voice) | 2000-12-15 |
| Series | Static Shock | Unknown | 2000-09-23 |
| Series | Providence | Unknown | 1999-01-08 |
| Series | Batman Beyond | Unknown | 1999-01-10 |
| Movie | Batman Beyond: Tech Wars / Disappearing Inque | T.V. Newscaster | 1999-05-08 |
| Series | Once and Again | Unknown | 1999-09-21 |
| Series | Judging Amy | Unknown | 1999-09-19 |
| Movie | The Land Before Time VI: The Secret of Saurus Rock | Grandma (voice) | 1998-12-01 |
| Series | Buffy the Vampire Slayer | Unknown | 1997-03-10 |
| Series | The Practice | Unknown | 1997-03-04 |
| Series | Ally McBeal | Unknown | 1997-09-08 |
| Movie | Vegas Vacation | Cousin Catherine | 1997-02-13 |
| Series | Brooklyn South | Unknown | 1997-09-22 |
| Movie | The Land Before Time V: The Mysterious Island | Grandma (voice) | 1997-09-12 |
| Series | Dharma & Greg | Unknown | 1997-09-24 |
| Series | The Legend of Calamity Jane | Lonely Sue (voice) | 1997-09-14 |
| Series | The New Batman Adventures | Unknown | 1997-09-13 |
| Series | The Spooktacular New Adventures of Casper | Poil (voice) | 1996-02-24 |
| Movie | Carpool | Franklin's Mom (voice) | 1996-08-23 |
| Movie | Waiting for Guffman | Costume Dresser | 1996-08-21 |
| Series | Malcolm & Eddie | 1996-08-26 | |
| Movie | From the Mixed-Up Files of Mrs. Basil E. Frankweiler | Evelyn Kincaid | 1995-06-06 |
| Series | Partners | Unknown | 1995-09-11 |
| Series | Murder One | Unknown | 1995-09-20 |
| Movie | Babe | Maa (voice) | 1995-07-18 |
| Series | The Nanny | Unknown | 1993-11-03 |
| Series | Stand By Your Man | Adrienne Stone | 1992-04-05 |
| Movie | Lonely Hearts | Helen | 1991-09-11 |
| Series | Taz-Mania | Jean (voice) | 1991-09-07 |
| Series | What-a-Mess | 1990-03-26 | |
| Series | Doogie Howser, M.D. | Unknown | 1989-09-19 |
| Movie | The Butter Battle Book | (voice) | 1989-11-13 |
| Movie | National Lampoon's Christmas Vacation | Cousin Catherine | 1989-11-30 |
| Movie | Hound Town | Sasha (voice) | 1989-10-31 |
| Movie | For Keeps | Donna Elliot | 1988-01-15 |
| Movie | 18 Again! | Betty Watson | 1988-04-08 |
| Series | Raising Miranda | 1988-11-05 | |
| Series | L.A. Law | Unknown | 1986-09-15 |
| Movie | Help Wanted: Kids | Helen | 1986-02-02 |
| Series | Night Court | Unknown | 1984-01-04 |
| Movie | Her Life as a Man | Sheila | 1984-03-12 |
| Series | Murder, She Wrote | Unknown | 1984-09-30 |
| Movie | Mr. Mom | Annette | 1983-07-22 |
| Movie | National Lampoon's Vacation | Cousin Catherine | 1983-07-29 |
| Series | Family Ties | Unknown | 1982-09-22 |
| Series | Cheers | Unknown | 1982-09-30 |
| Movie | Class Reunion | Bunny Packard | 1982-10-29 |
| Movie | First Family | Feebleman's Secretary | 1980-12-25 |
| Series | Who's Watching the Kids? | Unknown | 1978-09-22 |