Markie Post: Markie Post. Actress: There's Something About Mary. Markie Post grew up in Walnut Creek, California and started her career on films and TV shows, such as Card Sharks (1978) and "The New Card Sharks" (1986) and went on to even produce such projects as Double Dare (1976) and has made appearances on such television projects as 1st to Die (2003), E! True Hollywood Story (1996) and Electra Woman and Dyna...