Robert Prosky (born Robert Joseph Porzuczek, December 13, 1930 – December 8, 2008) was an American actor. He became a well-known supporting actor in the 1980s with his roles in Thief (1981), Christine (1983), The Natural (1984), and Broadcast News (1987).

Prosky's other notable movies include Gremlins 2: The New Batch (1990), Hoffa (1992), Mrs. Doubtfire (1993), Last Action Hero (1993), Rudy (1993), Miracle on 34th Street (1994), Dead Man Walking (1995), and Mad City (1997). His most notable television role was of Sgt. Stan Jablonski on the TV police drama Hill Street Blues.