Sir John Armstrong Spicer was an Australian lawyer, politician, and judge. He served two terms as a Senator for Victoria, representing the United Australia Party (UAP) from 1940 to 1944 and the Liberal Party from 1950 to 1956. Spicer was Attorney-General in the Menzies Government from 1949 to 1956. He left politics to become chief judge of the newly created Commonwealth Industrial Court, a position which he held until 1976.

The attorney-general of Australia (AG) is the minister of the Commonwealth of Australia who is the chief law officer of the government. They are charged with overseeing the national legal affairs and public security as the head of the Attorney-General’s Department. The current attorney-general is Mark Dreyfus, who was chosen by prime minister Anthony Albanese on June 2022 following the 2022 federal election. By convention, the attorney-general is a lawyer.