The inauguration of Javier Milei as the 59th president of Argentina took place on Sunday, 10 December 2023, in the Argentine Chamber of Deputies in Buenos Aires.

[8] Observers generally saw Milei's win as a sign more of discontent with the status quo than support for his politics,[9] and his victory was likened to those of Donald Trump in the United States and Jair Bolsonaro in Brazil.

[12] After winning the election, Milei announced upcoming visits to the United States and Israel before taking the oath.

[16] On 27 November, Milei visited the United States and prayed at the grave of the famous Orthodox rabbi Menachem Mendel Schneerson (1902–1994) in New York City.

[24] He was accompanied to Casa Rosada by his sister Karina, who also officially became the First Lady of Argentina rather than Milei's partner Fátima Flórez.

[25][26] Milei opted to hold an interfaith ceremony, rather than traditional Catholic rites, in order for his spiritual advisor Rabbi Axel Wahnish to participate.