David Carradine was still making movies when he died, with his latest completed film, Portland, due to be released next year.
Chuck Binder, Carradine's manager said that he was in Thailand to filming his latest movie. Mr Binder told the BBC he was shocked at news of the actor's death and added: "He was full of life, always wanting to work ... a great person."
However, the website of Bangkok newspaper The Nation cited unidentified police sources as saying Carradine was found on Thursday morning by a hotel maid in a wardrobe with a rope around his neck, hanged in his luxury hotel room, and he was believed to have committed suicide.
Carradine was born on december 8, 1936 in Hollywood, California, the son of Ardanelle Abigail (née McCool; 1911-1989) and noted American actor John Carradine (1906-1988). He was the half-brother of Bruce, Keith, Christopher and Robert Carradine, as well as the uncle of Ever Carradine and Martha Plimpton.
Carradine had Irish, English, Scottish, Welsh, German, Spanish, Italian, Ukrainian and Cherokee ancestry. Carradine attended Oakland Junior College and later studied drama at San Francisco State College before working as an actor on stage and in television and cinema. He changed his given name to David after starting his career.
David Carradine's most well known movies in recent years were Kill Bill 1 and 2, directed by Quentin Tarantino in 2003 and 2004. Carradine was a leading member of a venerable Hollywood acting family that included his father, character actor John Carradine, and brother Keith.