A new documentary film centered on the life of Soundgarden and Audioslave frontman Chris Cornell is in the works.

The film will be produced by Cornell’s widow, Vicky, along with Brad Pitt and Peter Berg’s Film 45 production company, which focuses on non-scripted entertainment and branded content.

In January, Vicky Cornell and a number of the grunge icon’s fellow musicians, including Pearl Jam’s Stone Gossard and Jeff Ament, threw a benefit concert, “I Am the Highway: A Tribute to Chris Cornell” at the Forum in Los Angeles. Guest performers included Miley Cyrus, Foo Fighters, Metallica, Brandi Carlile and Chris Stapleton. Pitt also made an appearance.

Here are some of those performances from that night.