Sir Oliver Howard Beale KBE was an Australian politician and diplomat. He was a member of the Liberal Party and served in the House of Representatives from 1946 to 1958, representing the New South Wales seat of Parramatta. He held ministerial office in the Menzies Government as Minister for Information (1949–1950), Transport (1949–1950), Supply (1950–1958), and Defence Production (1956–1958). He retired from parliament to serve as Australian Ambassador to the United States (1958–1964). His son Julian also entered politics.

Arthur Augustus Calwell KCSG was an Australian politician who served as the leader of the Labor Party from 1960 to 1967. He led the party through three federal elections, losing each one in turn.