Stephen Simpson Hillage is an English musician, best known as a guitarist. He is associated with the Canterbury scene and has worked in experimental domains since the late 1960s. Besides his solo recordings he has been a member of Khan, Gong and System 7.

Gong are a psychedelic rock band that incorporates elements of jazz and space rock into their musical style. The group was formed in Paris in 1967 by Australian musician Daevid Allen and English vocalist Gilli Smyth. Band members have included Didier Malherbe, Pip Pyle, Steve Hillage, Mike Howlett, Tim Blake, Pierre Moerlen, Bill Laswell and Theo Travis. Others who have played on stage with Gong include Don Cherry, Chris Cutler, Bill Bruford, Brian Davison, Dave Stewart and Tatsuya Yoshida.