<Tr> <Th> Spouse (s) </Th> <Td> Charlie Day (m . 2006) </Td> </Tr> <Tr> <Th> Children </Th> <Td> </Td> </Tr> <P> Mary Elizabeth Ellis (born May 11, 1979) is an American actress . She is best known for her role as The Waitress on the FX sitcom It's Always Sunny in Philadelphia . She has also starred in the NBC sitcom Perfect Couples and the Fox sitcom The Grinder . She also starred as Nick's ex-girlfriend in the series New Girl . Mary plans to open her next business venture, "Finger Fantasy" an all inclusive nail salon, on the outskirts of Philadelphia late 2019 . </P> <P> Ellis was born in Laurel, Mississippi . She graduated from Southern Methodist University in 2002 . </P>

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