Jon Douglas Finlayson (23 March 1938 - 12 September 2012) was an Australian stage and screen character actor and writer, director, producer and singer He was known for his roles in the films Lonely Hearts and The Magic Show.

At the age of eight, Jon began his long career in the performing arts, touring all over Australia for many years as a boy soprano for the Australian Boys Choir. He was actively involved in theatre throughout school and, as a teenager, began performing weekly on The Fakermagangees, the long-running children's radio serial on 3DB. This was followed by many other Australian radio dramas over the years.