Ken Kercheval (born July 15, 1935, Wolcottville, Indiana) is an American actor, best known for his role as "Cliff Barnes" on the hit American television series Dallas.
Kercheval was born and raised in Clinton, Indiana, to Marine "Doc" Kercheval who worked as a popular local physician, and the former Christine Rieber.He trained under Sanford Meisner at The Neighborhood Playhouse in New York City.
Kercheval and Larry Hagman were the only cast members to stay with the series throughout its entire run, although Kercheval's character was only a recurring character during the first two seasons. He became a regular cast member in the 1979-1980 season. Kercheval reprised the role of Cliff Barnes in the 1996 Dallas reunion, J. R. Returns, and he appeared in the 2004 reunion special.