Ken Kercheval, an actor who played oil tycoon Cliff Barnes on the popular soap opera Dallas, has died at age 83.
A spokeswoman at Frist Funeral Home in Mr Kercheval’s hometown of Clinton, Indiana, confirmed his death to the BBC but was unable to give further details.
Local newspaper The Daily Clintonian reports that he passed away on Sunday.
He and Larry Hagman, who played rival character JR Ewing, were the only stars to stay with the series throughout its entire 14-year run.
“He was one of those guys who was going to be the next James Dean,” David Jacobs, the creator of Dallas, told the Hollywood Reporter.
Mr Kercheval, born in 1935, trained at Indiana University and the Neighborhood Playhouse in New York.
He began his career as a stage actor, appearing with Dustin Hoffman in a 1959 production of Dead End and starring in several Broadway shows during the 1960s.
In 1978 he was cast in Dallas’ initial five-part miniseries, originally playing Ray Krebbs, an illegitimate son of Jock Ewing – JR Ewing’s father.
The series – about two wealthy, rival families in the oil industry – became one of the era’s signature shows and won four Emmy Awards.
It also had a huge global following, with episodes dubbed into 67 languages across 90 countries.
After the show ended in 1991, Mr Kercheval returned for reunion specials in 1996 and 2004, and for a series reboot from 2012-14.
Mr Kercheval was also a prolific film and TV actor. Before and after Dallas, he appeared on shows including Kojak, Starsky and Hutch and Diagnosis Murder.
The actor confessed to smoking up to three packs of cigarettes a day, and had part of his lung removed in 1994 after being diagnosed with cancer.
He was also a self-described “practicing alcoholic” for 20 years before giving up alcohol.