Producer Butch Vig says that Dave Grohl wanted Neil Young to join him and the remaining members of Nirvana for the Sound City documentary.

Vig shared this behind-the-scenes story during a recent interview with the Daily Beast.

"The only project I'm bummed didn't happen was when we were doing Sound City, Dave Grohl was inviting people in to jam in the studio and we had set up a session for Krist and Dave from Nirvana to play with Neil Young.

It would have been f—ing awesome."

"And I know if Neil Young played with them he'd go, oh, let's go on tour and play some shows together!

It would be like Crazy Horse on steroids. But then it didn't happen.

Neil Young had a book coming out so he was on a book tour, and Dave had to go interview him somewhere else. It's a bummer, man."