Gerardo Werthein (born 3 December 1955)[1] is an Argentine businessman and diplomat serving as the minister of foreign affairs, international trade and worship of Argentina since 30 October 2024.

His great-grandfather, Leon Werthein, emigrated from Bessarabia to Argentina in 1904 with his wife Ana Jajam and their four children, Gregorio, Elisa, Numo, and Israel, fleeing the persecution of Jewish people by the Russian Empire.

[7] During his tenure as president, Buenos Aires was selected as the host city for the 2018 Summer Youth Olympics, which took place in October of that year.

[8] After Milei's presidential inauguration, he nominated Werthein as the Argentine ambassador to the United States.

[3] Werthein was appointed foreign minister by President Milei on 30 October 2024 following the dismissal of Diana Mondino.