Henri was born in Lausanne, Switzerland, brought up in Paris, and migrated to Australia at the age of 8. He gained degrees in science and electrical engineering at the University of Sydney while studying acting at the Ensemble Theatre. He had a successful theatre and TV career for four years in Australia before going to the UK in 1971. There he worked extensively on stage in productions such as Tony Richardson's 'I Claudius', the Prospect Theatre Company's tour of international festivals around the Mediterranean and Russia, (1973-4), with Derek Jacoby, and on TV in productions such as Colditz (1972) (with Robert Wagner), Misleading Cases (1967), and La légende des Strauss (1972). Since returning to Australia in the mid-seventies he has gained a strong theatre following with performances including 'The Good Doctor' (1975), Saul in 'Travelling North' (1979), 'Glengarry Glen Ross' (1986), 'The Double Bass' (1990) and 'Sky' (1992). The last two are solo plays which played Sydney, Melbourne, and Perth, and attracted extraordinary public and critical acclaim. He later repeated the role of Saul in the film of Travelling North (1987) with Leo McKern. Other films include You Can't See 'round Corners (1969), Le plombier (1979) with Director Peter Weir, The Edge of Power (1987), Run Rebecca, Run! (1981), The Return of Captain Invincible (1983), and Les Patterson Saves the World (1987).