Ioannis Grivas (Greek: Ιωάννης Γρίβας; 23 February 1923 – 27 November 2016[1]) was a Greek judge, who served as President of the Court of Cassation and served as the Prime Minister of Greece at the head of a non-party caretaker government in 1989.
He took part as a judge in the Greek Junta Trials in 1975, and in 1979, he was appointed to the Supreme Court of Greece for Civil and Criminal Cases.
Papandreou changed the electoral law to prevent the opposition party from gaining a majority, leading to the Greek Parliament being deadlocked following the 18 June 1989 elections.
The Constitution required the president of one of Greece's Supreme Courts to be appointed interim Prime Minister.
[2][3] After the elections produced another deadlocked Parliament, he resigned on 23 November 1989 in favor of Xenophon Zolotas, who formed a National Unity government in which all three parliamentary parties participated.