Klaus Voormann (born 29 April 1938) is a German artist, musician, and record producer.
Voormann was the bassist for Manfred Mann from 1966 to 1969, and performed as a session musician on a host of recordings, including "You're So Vain" by Carly Simon, Lou Reed's Transformer album, and on many recordings of the former members of the Beatles. As a producer, Voormann worked with the band Trio on their worldwide hit "Da Da Da".
Voormann's association with The Beatles dates back to their time in Hamburg in the early 1960s. He lived in the band's London flat with George Harrison and Ringo Starr after John Lennon and Paul McCartney moved out to live with their respective partners. He designed the cover of their album Revolver, for which he won a Grammy Award. Following the band's split, rumours circulated of the formation of a group named the Ladders, consisting of Lennon, Harrison, Starr and Voormann. This failed to materialise; however, all four would-be Ladders (plus Billy Preston) performed on the Starr track "I'm the Greatest", and Voormann did play on solo albums by Lennon, Harrison and Starr, as well as briefly being a member of the Plastic Ono Band. In the 1990s, he designed the artwork for The Beatles Anthology albums.
In 2009, Voormann released his debut solo album A Sideman's Journey, which featured the two surviving Beatles, McCartney and Starr, performing as "Voormann and Friends".
Voormann has designed artwork for many bands, including the Beatles, Harry Nilsson, the Bee Gees, Wet Wet Wet and Turbonegro.