It's a historical meeting, the first ever face-to-face encounter between Russia's President Vladimir Putin and President Donald Trump.
The two briefly shook hands Friday ahead of their formal meeting on the sidelines of the G-20 summit in Hamburg, Germany.
The sit-down is scheduled to begin before 3 p.m. London time. During their bilateral gathering, they are set to talk about terrorism, Syria and North Korea, but political analysts don't expect any significant outcome.
"The Kremlin seeks to discuss a wide range of topics from economic relations to the conflicts in Syria and Ukraine, while the U.S. side prefers a loose agenda for this first official meeting," Wolfango Piccoli, co-president of Teneo Intelligence, said in a note. "It is unlikely that this closely-watched meeting will result in any tangible outcomes."