Jean Elizabeth Smart (born September 13, 1951) is an American actress. She has received numerous accolades including five Primetime Emmy Awards, a Golden Globe Award, four Critics' Choice Awards, and two Screen Actors Guild Awards as well as nominations for a Tony Award and a Grammy Award.

Smart first gained prominence for her leading role as Charlene Frazier Stillfield on the CBS sitcom Designing Women, in which she starred from 1986 to 1991. She went on to win five Primetime Emmy Awards for her roles as Lana Gardner in the NBC series Frasier (2000–01), Regina Newley in the ABC sitcom Samantha Who? (2007–09), and Deborah Vance in the HBO Max comedy series Hacks (2021–present). She was Emmy-nominated for her roles in The District (2000–04), 24 (2006–07), Harry's Law (2011), Fargo (2015), Watchmen (2019) and Mare of Easttown (2021). She also acted in FX's Legion (2017–2019) and voiced Ann Possible in the Disney Channel animated series Kim Possible (2002–2007).