Phil Collins' old group was GENESIS, a British rock band formed in 1967. The band's lineup consisted of Phil Collins, Tony Banks, Mike Rutherford, and Peter Gabriel. GENESIS is known for their progressive and psychedelic rock sound, which was popular in the 1970s and 1980s. They released several successful albums, including 'Foxtrot' (1972), 'The Lamb Lies Down on Broadway' (1974), and 'Invisible Touch' (1986). Phil Collins left the band in 1996, but GENESIS continues to tour and record music today.