Sir John Robert Kerr, was an Australian barrister and judge who served as the 18th governor-general of Australia, in office from 1974 to 1977. He is primarily known for his involvement in the 1975 constitutional crisis, which culminated in his decision to dismiss the incumbent prime minister Gough Whitlam and appoint Malcolm Fraser as his replacement, which led to unprecedented actions in Australian federal politics.

The 1975 Australian constitutional crisis, also known simply as the Dismissal, culminated on 11 November 1975 with the dismissal from office of the prime minister, Gough Whitlam of the Australian Labor Party (ALP), by Sir John Kerr, the Governor-General who then commissioned the leader of the Opposition, Malcolm Fraser of the Liberal Party, as prime minister. It has been described as the greatest political and constitutional crisis in Australian history.