Robert John Guest, OBE (17 July 1950 – 1 October 2008) was a British-born New Zealand-Australian actor, television personality and host and singer, who started his career in pop music in New Zealand, before becoming best known for his work in Australian musical theatre, particularly in various productions of The Phantom of the Opera.
He played the lead for a record 2,289 performances over seven years, more than any other performer.