Dack Rambo (November 13, 1941 – March 21, 1994) was an American actor best known for his role as Jack Ewing in the television series Dallas, from 1985 until his dismissal in 1987.
He was also known for his role as Grant Harrison on the NBC soap opera Another World, from 1990-1991.
He had a twin brother, Dirk Rambo, who died in 1967.
After being diagnosed with HIV in 1991 he acknowledged being bisexual and campaigned for AIDS awareness until his death. Rambo died on March 21, 1994 due to complications from AIDS.