Donald Richard Spencer is an Australian singer-songwriter, musician, and former children's television presenter. He had a long tenure as a host on Play School on both the Australian version (1968–99) and the United Kingdom version (1972–88), one of only two presenters to work on both versions.

Play School is an Australian educational television show for children produced by the educational department of the Australian Broadcasting Corporation (ABC), based on the original British version created by Joy Whitby, with many of the presenters former school teachers, whilst others being a mix of well known stage and screen actors and musicians. It is the longest-running children's show in Australia and the second-longest-running children's show worldwide after British series Blue Peter.