Soul music legend Isaac Hayes was found dead in his Memphis, Tennessee home over the weekend. He was 65 years old.

Family members say they found Isaac unconscious in his home next to a still-running treadmill.

Hayes was most known by the younger generation as the voice of Chef on "South Park." From the late 1990's to 2006, Isaac Hayes was the comical mentor to the "South Park" boys. His character was killed off after Hayes got into a dispute with the show's producers reportedly over the religious cult, Scientology.

He released his first solo album in 1967, and his 1969 follow-up, "Hot Buttered Soul," became a platinum hit.

In 1971, the theme from "Shaft" topped the Billboard Hot 100 for two weeks and won an Academy Award for best original theme song. The song and the movie score also won Grammy awards for best original score and movie theme.

Hayes was inducted into the Rock n' Roll Hall of Fame in 2002.