Dolly and Carl met when she was 18 and he was 21 in Nashville, and started dating in 1966.
They married two years later in a small ceremony in Georgia with only her mother, the preacher and his wife present.
But when the singer shot to fame, she revealed Carl had made it clear that he wanted to no part of it, requesting to remain out of the spotlight.
“He just doesn’t have any desire to be in show business,” she said in her 1978 Playboy interview.
“He doesn’t want to go out to the supermarket and have people say, ‘That’s Dolly Parton’s husband.'”