Ken Kercheval ( born July 15 , 1935 ) is an American actor , best known for his role as Cliff Barnes on the 1980s television series `` Dallas '' and its 2012 revival .
Ken Kercheval ( born July 15 , 1935 ) is an American actor . He was best known for his role as Cliff Barnes on the 1980s television series `` Dallas '' and its 2012 revival .