The Plastic Ono Band was a rock band formed by John Lennon and Yoko Ono in 1969 for their collaborative and solo projects based on their 1968 Fluxus conceptual art project of the same name. Lennon and Ono began a personal and artistic relationship in 1968, collaborating on several experimental releases. After their marriage in 1969, they decided their future endeavours would be credited to the Plastic Ono Band. The band featured a rotating line-up of musicians including Eric Clapton, Klaus Voormann, Alan White, Billy Preston, Jim Keltner, Keith Moon, Delaney & Bonnie and Friends, and Lennon's former Beatles bandmates George Harrison and Ringo Starr. After Lennon and Ono moved to New York in 1971, they collaborated with Elephant's Memory under the name "Plastic Ono Elephant's Memory Band". Lennon's collaborations continued under similar names until 1974. From 2009 to 2015 (29 years after Lennon was murdered), Ono and her son Sean Lennon led a new incarnation of the group, the Yoko Ono Plastic Ono Band. History Origins and formation (1968–1969) John Lennon and Yoko Ono first met in 1966. Lennon was a world-famous member of the Beatles, and Ono was an avant-garde artist and performer. By 1968, the two established a romantic relationship and they began collaborating on a number of musical projects. The Plastic Ono Band name, and its Fluxus idea of an open-ended plastic band, was first conceived of by Ono in 1967 as an idea for an art exhibition in Berlin. The Plastic Ono Band was first realized in 1968 as a multi-media machine maquette by John Lennon, also called The Plastic Ono Band. In 1968, Lennon and Ono began a personal and artistic relationship (they married in 1969) in which they decided to credit their future endeavors as the work of The Plastic Ono Band. Ono and Lennon collaborated on several art exhibitions, concerts, happenings and experimental noise music recording projects, before recording and releasing somewhat more standard rock-based albums that were still connected to the Plastic Ono Band concept. They first recorded together in May 1968; these recordings would be released in November as the experimental album Unfinished Music No.1: Two Virgins. The pair also worked throughout the summer on "Revolution 9", an experimental piece that appeared on the Beatles' self-titled double album (also known as the "White Album"). In December 1968, Lennon and Ono appeared together at The Rolling Stones Rock and Roll Circus