A cut of Kurt Cobain: Montage Of Heck premiered at Sundance last night. It’s the first fully authorized documentary about the Nirvana singer, and was executive produced by his daughter, Frances Bean Cobain. The film will air later this year on HBO. Notably, the film does not feature any interview footage of Dave Grohl, though the director says that may not be the case for the version that eventually ends up on HBO, as Billboard reports. Director Brett Morgen said that while Grohl interviewed for the documentary earlier this month, it was too late to include them in the version of the film that premiered last night. “We had a locked print and trying to re-edit a film with a new interview in 10 days is kind of difficult. This is the picture I wanted—I didn’t want there to be a lot of people in the film. I hope we’ll see a version [with Grohl’s interview] sometime.” The film will also contain Cobain’s acoustic cover of the Beatles’ “And I Love Her.” “It’s as intimate you can get,” Morgen said about the film. “People have projected fantasies on the limited amount of things that came out between 1991 and 1994 (from Cobain). I have a great degree of confidence the more you get to know him, the more you’ll love him.”

AP has more:

The director says he finished color correcting the movie less than a week ago, and when he was finished he “went to the bathroom and cried for about 25 minutes.”

“I wasn’t crying because Kurt died,” he said.” I was crying because I wasn’t going to be able to spend time with him anymore. And for the last two years he’s been everything in my life.”

The premiere offered a rare joint appearance of Frances Bean and her mother. Krist Novoselic and Kurt’s mother and sister Kim were on hand as well.

Here's a first look at some of the animation in #montageofheck. @Nirvana @HiskoHulsing pic.twitter.com/jbDehhnuKW

— Brett Morgen (@brettmorgen) January 23, 2015

So sad @brettmorgen @alka_seltzer666 so so sad yet so uplifting, beautiful and gorgeous. Your daddy would be so proud of you baby. thank u

— Courtney Love Cobain (@Courtney) January 25, 2015

The Meat Puppets played the afterparty, where The D Train star Jack Black rushed onstage. Here’s some video…