David Hart (born February 6, 1954) is an American actor and singer best known for his portrayal of Sgt. Parker Williams on the smash-hit television series In the Heat of the Night (1988 to 1995). He has appeared in numerous films. Hart continues to perform in theater around the country, most recently performing as Charlemagne in Pippin and Oscar in The Odd Couple. He has also appeared in numerous commercials, including IHOP Restaurants, Maxwell House Coffee, Coors Light Silver Bullets, John Deere and GE.