Donald Richard "Don" Spencer OAM (born 22 March 1941 in Tamworth) is an Australian children's television presenter and musician. He had a long-running role on Play School on both the Australian version (1968–97) and the United Kingdom version (1972–89). In March 1963 his first single, "Fireball" – the theme tune to a UK TV science fiction series, Fireball XL5 – reached No. 32 on the UK Singles Chart. In 2002 Spencer established the Australian Children's Music Foundation. On Australia Day (26 January) 2007 he was awarded a Medal of the Order of Australia (OAM) with the citation "for service to children's music and television as a songwriter and performer, and through the establishment of the Australian Children's Music Foundation". Spencer married Julie Horsfall, they have two children: Dean, a musician; and Danielle Spencer, an actress and singer, who married fellow actor, Russell Crowe, in 2003.