It is one of the most open presidential elections in decades and taking place under the shadow of the South American country's worst economic crisis in 20 years.
Argentines are heading to the polls as a chainsaw-wielding TikTok economist took the lead in the first round of voting. The vote is likely to disturb Argentina's already-shaky markets, and impact its ties with trading partners.
A candidate needs more than 45% of the vote - or 40% and a 10-point lead, to avoid a second run-off, which would be held on 19 November. The first results are expected around 9pm local time this evening. What will the winner have to deal with? Whoever wins will have to deal with an economy on life support: central bank reserves are empty, a recession is expected after a major drought, and a $44bn programme with the International Monetary Fund is wobbling.