Which Beatle did Peter Frampton assist on their solo album, "All things must pass"?

Peter Frampton assisted George Harrison on the solo album All Things Must Pass.

Released in 1970, All Things Must Pass was Harrison's first major solo album after the Beatles' breakup. The ambitious three-disc project brought together a large group of musicians, including Ringo Starr, Eric Clapton, Billy Preston, members of Badfinger, and the young Peter Frampton.

Frampton contributed guitar during the recording sessions, adding acoustic-guitar parts alongside Harrison and Badfinger on several tracks. Although Frampton was not one of the album's headline performers, the session became an important early connection in his career and helped establish his relationship with Harrison.

The album is often remembered for songs such as “My Sweet Lord,” “What Is Life,” and “Isn't It a Pity.” Frampton later became a major rock star in his own right, particularly after the success of Frampton Comes Alive! in 1976. The question refers to Harrison's album, not a Beatles group release.