Mary Elizabeth Ellis was born on May 11, 1979 in Laurel, Mississippi, USA. She is an actress and writer, known for It's Always Sunny in Philadelphia (2005), A Quiet Little Marriage (2008) and Piss Hat (2004). She has been married to Charlie Day since March 4, 2006. They have one child.
| Movie | Masterminds | Unknown | 2016 |
| Movie | Pulling | Karen | 2016-02-12 |
| Series | Brooklyn Nine-Nine | Unknown | 2016-02-11 |
| Movie | The Truth About Lies | Unknown | 2016 |
| Movie | Step 9 | Marian | 2015 |
| Series | The Grinder | Debbie Sanderson | 2015-09-29 |
| Series | Comedy Bang! Bang! | Unknown | 2014 |
| Movie | The Last Time You Had Fun | Alison | 2014-06-14 |
| Movie | God I Hope I Get It | Unknown | 2013 |
| Series | Drunk History | Unknown | 2013-07-09 |
| Movie | Well Enough Alone | Unknown | 2012 |
| Movie | Tracer Gun | Unknown | 2012 |
| Series | Georgia | Georgia | 2012-09-17 |
| Series | New Girl | Unknown | 2011-09-20 |
| Movie | Hierophant | Unknown | 2011 |
| Series | Up All Night | Unknown | 2011-09-14 |
| Series | Happy Endings | Unknown | 2011-04-13 |
| Series | Perfect Couples | Unknown | 2010 |
| Movie | Comic-Con 2010 Live | Unknown | 2010 |
| Series | Old Friends | Unknown | 2009-06-05 |
| Movie | A Quiet Little Marriage | Unknown | 2008 |
| Series | It's Always Sunny in Philadelphia | Unknown | 2006 |
| Movie | Seed | Fay | 2005-11-02 |
| Movie | Piss Hat | Lucy | 2004-09-04 |
| Series | House M.D. | Unknown | 2004-11-16 |
| Series | Cracking Up | Unknown | 2004-03-09 |
| Movie | The Curse and the Smoking Jacket | Renee | 2003-08-03 |
| Series | Cold Case | Unknown | 2003-09-28 |
| Series | Reno 911! | Unknown | 2003-07-23 |
| Movie | Party Foul | His Girl | 2003-02-10 |
| Series | Without a Trace | Unknown | 2002-09-26 |