Jonathan James English was an English-born Australian singer, songwriter, musician and actor. He emigrated from England to Australia with his parents in 1961. He was an early vocalist and rhythm guitarist for Sebastian Hardie but left to take on the role of Judas Iscariot in the Australian version of the stage musical Jesus Christ Superstar from May 1972, which was broadcast on television. English was also a solo singer; his Australian top twenty hit singles include "Turn the Page", "Hollywood Seven", "Words are Not Enough", "Six Ribbons" and "Hot Town".

Sebastian Hardie were Australia's first symphonic rock band. They formed in Sydney in 1967 as Sebastian Hardie Blues Band but dropped the 'Blues Band' reference when they became pop-oriented. By 1973 they developed a more progressive rock style, and later performed as Windchase, but disbanded in 1977. An early member of Sebastian Hardie was Jon English, who starred as Judas Iscariot in the Australian version of the stage musical Jesus Christ Superstar in 1972 and subsequently had a solo career as a singer, actor and playwright. A later member, Mario Millo became a multi-award winner for his television and movie music.