It was around this time that Gram Parsons found another soulmate in Keith Richards of the Rolling Stones.They bonded over their mutual love of music and unfortunately drugs.

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To this day, Polly says she still gets letters from fans of her father, sometimes from teenagers, who say they grew up with his music, it was what their parents played while they danced in the living room."The other thing that is repetitious in nature with the letters that I receive, is Gram brought me through some of the darkest times in my life, and for that I am forever grateful," she said.

She's also grateful to have her father's songs, bittersweet though they may be to her today, including "Thousand Dollar Wedding," which she says was written for her mother."The pain in his voice about the state of the affairs that they were in in that moment is so potent, you know? After today's events in Austin, Polly says she hopes to schedule events to support the Gram Parsons Foundation in other cities.

Stones biographer Robert Greenfield calls them the psychedelic version of Don and Phil, the Everly brothers.

Parsons was hanging out with Keith in France in 1971, while the Stones recorded "Exile on Main Street," and while he doesn't play on that record, his stamp is all over it, especially the steel guitar sound on songs like "Torn and Frayed."Gram Parsons, The Father While all this was going on, Polly Parsons was just an infant. She just remembers an idyllic childhood, playing Go Fish on the floor with her father in their Laurel Canyon home."I remember crawling up on my mother and my father laying on this beautiful silk day bed that overlooked the picture window through the garden and they were both naked. That was the same day we played Go Fish on the kitchen floor," she said.

He was just 26 when he died and it left such a hole in their lives that her mom wouldn't allow Gram's music in their house.

So she had to sneak away and listen to it under her bed--and it filled part of the hole."Still to this day I think that's one of the beautiful things about Gram Parsons," she said.

But as a teenager, after he died, Polly's trouble with cocaine and alcohol addiction started.

And she kept it a secret that she was the daughter of the already legendary Gram Parsons."There was a time in my life where I was acutely aware that people really needed me to be the historian on my father's life.

After high school, he enrolled at Harvard to study theology but stayed there only one semester.

He also formed the International Submarine Band, releasing a record called "Safe At Home" in 1968.

They really needed me to know more than they did about my father and his music and his journey and his past and his history, and I didn't want to be that person," she said.