At one point, [Billy] said to me, 'You going deep?' And I said, ‘Yeah, and you know you’re going to go deep too,'" the film’s co-director Susan Lacy says.

And So It Goes recruits many of the title legend’s musician pals, from Bruce Springsteen and Sting to, surprisingly, Nas, who speaks to the way “Piano Man” still resonates. They all testify to Joel’s songwriting chops,

It's no wonder that for their two-part documentary, Billy Joel: And So It Goes (now playing on HBO and HBO Max), the co-directors, 14-time Emmy winner Susan Lacy and two-time winner Jessica Levin, went into the project knowing they had their work cut out for them.

Billy Joel is opening up about one of the most complicated chapters of his life in his new documentary, "Billy Joel: And So It Goes."

Piano Man Billy Joel opened up about falling for his best friend's wife in a new documentary, "Billy Joel: And So It Goes," premiering July 18.

As someone who has seen all the Billy Joel documentaries, I can confidently say that this two-part HBO docuseries is by far the best of the bunch.

He didn’t see the film until it was finished, so he stuck by that, and we took that as permission to tell the real story about Billy Joel.”

Steve Cohen, who is executive producing the new documentary "Billy Joel: And So it Goes," said that his fingers are crossed that the 76-year-old will perform again after his brain disorder diagnosis.