Ellis has appeared on a number of television shows, including Cold Case, Without A Trace, House M.D., and Reno 911!. In 2008 she wrote and portrayed the lead role of Olive in the independent film A Quiet Little Marriage.
|2004||Reno 911!||Inbred Twin||1 episode|
|2006||House M.D.||Sophie||1 episode|
|2007||Without A Trace||Sally Price||1 episode|
|2005 - 2009||It's Always Sunny in Philadelphia||Waitress||Recurring role|
|2009||Cold Case||Shelly Reid||1 episode|
|2008||A Quiet Little Marriage||Olive||Also credited as a writer|
Ellis is married to actor Charlie Day. Day is a writer, producer and actor on It's Always Sunny in Philadelphia. On the show, Day's character's obsession with Ellis's character is a recurring theme. The couple married on March 4, 2006.