Sir Rupert James Hamer,, also known as Dick Hamer, was an Australian politician who served as the 39th premier of Victoria from 1972 to 1981, and prior to that, the 18th deputy premier of Victoria from 1971 to 1972. He held office as the leader of the Victorian division of the Liberal Party of Australia (LPA) and a member of the Victorian Legislative Assembly (MLA) for the division of Kew.

The premier of Victoria is the head of government of Victoria, Australia. The premier leads the Cabinet of Victoria and selects its ministers. The premier is appointed by the governor of Victoria and must be a member of and command confidence in the Victorian Legislative Assembly, the lower house of the Parliament of Victoria, meaning the support of a majority of Legislative Assembly members. This is usually the leader of the political party that holds a majority of lower house members.