An accomplished bass player and musician, producer, and artist, he was a close friend of various members of The Beatles and was at the center of the action at various stages in the band's career since the band's Hamburg days. He eventually became a member of the band Manfred Mann in the 1960s, having turned down roles in both the Hollies and the Moody Blues.
Voormann once roomed with George and Ringo in the band's Green Street flat in London during the early days of their career after Lennon left to live with his then wife Cynthia and Paul went to live with Jane Asher and her family in their attic. He played on many albums released the Beatles members after the group broke up. He was briefly a member of the Plastic Ono Band and it was rumored for a time that a new group consisting of Voormann, Lennon, Harrison, and Starr called The Ladders was being formed. The four plus Billy Preston did perform on the Ringo Starr track "I'm the Greatest" as well on solo albums for Starr, Harrison, and Lennon.
Voormann also famously design the artwork for the Revolver album, for which he earned £40 and won a Grammy Award for Best Album Cover, Graphic Arts. He more recently designed the album art for Beatles Anthology series.