Mary Elizabeth Ellis

Mary Elizabeth Ellis, born in Laurel, Mississippi, is an American actress and writer who plays the part of Vance's girlfriend Amy. She is best known for her role as the waitress on the television sitcom "It's Always Sunny in Philadelphia." She has also appeared on a number of television shows, including "Cold Case," "Without A Trace," "House," and "Reno 911!." In 2008 she wrote the independent film "A Quiet Little Marriage," and played the lead role of Olive.