Concerto for Group and Orchestra is a live album by Deep Purple and the Royal Philharmonic Orchestra conducted by Malcolm Arnold, recorded at the Royal Albert Hall, London, in September 1969. It consists of a concerto composed by Jon Lord, with lyrics written by Ian Gillan. This is the first full length album to feature Ian Gillan on vocals and Roger Glover on bass. It was released on vinyl in December 1969. The original performance included three additional Deep Purple songs, "Hush", "Wring That Neck", and "Child in Time"; these were included on a 2002 release. This was the last Deep Purple album distributed in the US by Tetragrammaton Records, which went defunct shortly after.

Deep Purple are an English rock band formed in London in 1968. They are considered to be among the pioneers of heavy metal and modern hard rock, although their musical style has varied throughout their career. Originally formed as a psychedelic rock and progressive rock band, they shifted to a heavier sound with their 1970 album Deep Purple in Rock. Deep Purple, together with Led Zeppelin and Black Sabbath, have been referred to as the "unholy trinity of British hard rock and heavy metal in the early to mid-seventies". They were listed in the 1975 Guinness Book of World Records as "the globe's loudest band" for a 1972 concert at London's Rainbow Theatre and have sold over 100 million records worldwide.