Rolling Stones onstage, 1972

ELLE: See new photos of Mick Jagger by Jim Marshall.

MIck Jagger backstage, 1972

Vulture: See Long-Lost Shots of the Rolling Stones in the Exile on Main St. Era.

Keith Richard and Mick Jagger, at recording studio for Exile on Main Street, Los_Angeles, 1972

TIME LightBox: Rock ‘n’ Roll Legend: Jim Marshall’s Musician Portraits  Read more: Rock ’n’ Roll Legend: Jim Marshall’s Musician Portraits.

He photographed legends and his pictures have become iconic in American cultural history, but the vast majority of music photographer Jim Marshall’s work has never been seen. Since his death in 2010, Marshall’s estate has been combing through millions of unpublished negatives. This month, a new book and two gallery shows will debut many never-before-published images from Marshall’s coverage of the Rolling Stones 1972 tour, as well as singular portraits of musicians including Johnny Cash, BB King and Joni Mitchell.

Rolling Stones onstage, 1972

CNN: In 1972, the Rolling Stones let it loose for photographer Jim Marshall.

Based on Mick Jagger's serious expression and Keith Richards' focused stare, it was clear the pressure was on.

It was the summer of 1972, and the Rolling Stones were on their American concert tour for their acclaimed "Exile on Main Street" album. But when they were not onstage and rocking out with their fans, they were hard at work remixing tracks at the Sunset Sound studio in Hollywood.

EXPERIENCE MUSIC PROJECT (EMP) in Seattle, Summer 2012.

The first solo museum exhibition of Jim's work opened at Experience Music Project (EMP) in Seattle on July 14, 2012.

Jim Marshall (Photo credit: Henry Diltz, Morrison Hotel Gallery)

Complex: The Stories Behind Jim Marshall's Iconic Photos.

Nearly 40 years ago, Jim Marshall embarked on The Rolling Stones 1972 tour as their official life photographer. After starting his career in photography in 1958, Marshall gained unrivaled access to jazz and rock artists throughout the 1960s and 1970s. From Jimi Hendrix burning his guitar at the Monterey International Pop Music Festival in 1967 to Bob Dylan kicking a tire around Greenwich Village, Marshall's ability to be in the right place at the right time turned into a vast estate of iconic images.

Pocket Cash by Jim Marshall.

Pocket Cash" includes a selection of never-before-seen images of Johnny Cash from the final book developed with Jim Marshall.

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