Mary Elizabeth Ellis (gebore 11 Mei 1979) is 'n Amerikaanse aktrise en skryfster. Sy is bekend vir haar rolle in die rolprente Free State of Jones (2016) en Masterminds (2016), en in die televisiereekse Without a Trace (2002) en It's Always Sunny in Philadelphia (2005).
- 2008: A Quiet Little Marriage
- 2014: The Last Time You Had Fun
- 2016: Free State of Jones
- 2016: Masterminds
- 2018: The Truth About Lies
- 2002: Without a Trace
- 2005: It's Always Sunny in Philadelphia
- 2009: Old Friends
- 2010: Perfect Couples
- 2012: Georgia
- 2015: The Grinder
- 2017: Santa Clarita Diet
- 2004: It's Always Sunny on TV
- 2009: Pulling
- 2018: Mother, May I Dance with Mary Jane's Fist?: A Lifetone Original Movie for Adult Swim
- 2009: The Nightman Cometh Live!
