World leaders congratulated US President-elect Donald Trump on taking office hours before Trump's inauguration in Washington.
Russian President Vladimir Putin said he was open to dialog with the new US administration on Ukraine and nuclear arms.
The Russian president, who said he wanted to secure long-lasting peace in Ukraine rather than a short ceasefire, made the comments during a meeting of Russia's Security Council.
Brazilian President Luiz Inacio Lula da Silva said he hopes US President-elect Donald Trump will have a "fruitful" second term in the White House and maintain his country's "historic" partnership with Latin America's No.1 economy.
"On our side, we do not want to get into any fight with the US or with Venezuela, China, India, Russia," leftist Lula said. "We want peace, harmony, and relations in which diplomacy is the most important thing."
Peace and cooperation
Ukrainian President Volodymyr Zelensky said he was looking forward to "active and mutually beneficial cooperation."
"President Trump is always decisive, and the peace through strength policy he announced provides an opportunity to strengthen American leadership and achieve a long-term and just peace, which is the top priority," Zelensky said on X.
Turkey's Erdogan said "Since Mr. Trump repeatedly said he would end the Russia-Ukraine war, we as Turkey will do whatever necessary in this regard."
"I wish Mr. Trump's second term would bring good for all humanity."
German chancellor Olaf Scholz called America his country's closest ally and wished for a good transatlantic relationship.
"For centuries, the relationship between our two nations has been one of collaboration, cooperation and enduring partnership," said British Prime Minister Keir Starmer. "Together, we have defended the world from tyranny and worked towards our mutual security and prosperity."
"With President Trump's longstanding affection and historical ties to the United Kingdom, I know that depth of friendship will continue."