The two-day G20 summit in Argentina kicked off on Friday.
Argentinian President Mauricio Macri, who is also the term president for the summit, welcomed the guests including 19 world leaders and EU representatives.
Some 15,000 people are expected to attend the meeting. In addition, at least 3,000 journalists are following the meeting.
The summit's first session will be about humane values, global economy, future of business life and women empowerment.
The second session will cover sustainable development and climate, while the third will discuss infrastructure, energy and future of sustainable food.
A joint declaration is expected to be published at the end of the summit on Saturday.
The next G20 summit will be held in Osaka, Japan.
The G20 is made up of 19 countries and the EU. It seeks bring together the world's leading and emerging economies.