The Prime Minister welcomed the Indonesian president to Downing Street as the pair celebrated 75 years of relations between the two countries.
Sir Keir Starmer greeted Prabowo Subianto outside Number 10 on Thursday afternoon.
Mr Subianto, who was inaugurated last month, saw the Prime Minister earlier this week at the G20 leaders’ summit in Brazil.
Sir Keir and Mr Subianto discussed economic growth and trade between the UK and Indonesia and agreed to launch a new strategic partnership in 2025, Downing Street said.
The leaders also agreed to enhance cooperation in defence and security.
Ahead of their meeting, the Prime Minister told Mr Subianto: “It’s fantastic to be able to welcome you here.
“I saw you earlier this week but it is fantastic to have you here at Downing Street.”
Mr Subianto said it was a great honour to be welcomed to Number 10.
In a joint statement, the Prime Minister and president said through their new partnership the UK and Indonesia will work together to make the next 75 years “more prosperous, secure, and sustainable for all our peoples”.
Sir Keir arrived back in the UK on Wednesday after being in Brazil earlier this week.