United Nations Secretary-General Antonio Guterres congratulated the US and Iran for reaching a peace agreement on Sunday, shortly after US President Donald Trump announced the deal.
"I warmly congratulate the US & Iran for having reached a peace deal that provides for an immediate & permanent ceasefire, the reopening of the Strait of Hormuz, as well as a framework for further negotiations," Guterres said in a statement on X/Twitter.
"This represents a critical step towards the peaceful settlement of the conflict," he continued, concluding his statement by thanking Pakistan, Qatar, Egypt, Saudi Arabia, Turkey, and other countries for their efforts and the roles they played in bringing the agreement to fruition.
European leaders praise US-Iran deal
UK Prime Minister Keir Starmer additionally released a statement on X endorsing the deal.
" I warmly welcome today's agreement reached between the United States and Iran. This is a hugely important step forward in ending the war, ensuring regional stability, and reopening the Strait of Hormuz," Starmer stated.
Starmer congratulated Trump, as well as Pakistani and Qatari mediators, for their efforts, and said the nation's priority is for this agreement to turn into a "durable and lasting peace."
The prime minister affirmed the UK's position that the Strait of Hormuz must be a 'toll-free freedom of navigation' that must be restored, and the UK "...stand ready to support the technical talks that will begin."
French Prime Minister Emmanuel Macron also took to X to react to the deal, in a statement saying, "I welcome the agreement reached between the United States and Iran, the result of a diplomatic effort to which several partners have contributed. I call for its rapid and complete implementation by all belligerents."
Macron reaffirmed the importance of reopening the Strait of Hormuz and the "resumption of maritime traffic," to be done "urgently" and "unconditionally," without any toll restrictions.
The statement echoed the sentiment that this agreement paves the way for "solid and lasting peace" in the Middle East and must address Iran's nuclear and ballistic programs as well as its "policy of regional destabilization."
The Chancellor of Germany, Friedrich Merz, also commented on the news of the deal.
"I welcome the agreement between the US and Iran and congratulate President Trump and the Iranian side on this diplomatic breakthrough. This can pave the way towards a reinvigorated global economy and a more secure Middle East. It is crucial to implement it with determination," he said.
The announced deal between the United States and Iran marks a "potential breakthrough" in the war, and the EU will now weigh how it can be involved in the next phase, EU foreign policy chief Kaja Kallas said on Monday.
"From economic leverage to nuclear expertise and longstanding relationships with Gulf partners, the EU stands ready to contribute to a sustainable resolution," Kallas said in a post on X, before a meeting of foreign affairs ministers from the 27 EU member states in Brussels.
The agreement between the United States and Iran should allow for the "immediate reopening" of the Strait of Hormuz, EU Commission President Ursula von der Leyen said on Monday.
"The priority now is its swift and full implementation by all parties," von der Leyen said about the announced deal.
"Freedom of navigation must be restored toll-free. This is essential for regional stability and the global economy. It opens the door to broader negotiations on peace and security in the Middle East," she added.
Von der Leyen also said that peace in the Middle East was impossible "while Lebanon is in flames."
"Once again, Europe calls on all parties to respect Lebanon's sovereignty and territorial integrity and implement a genuine ceasefire," she said.
Iran must change behavior before any EU sanctions can be lifted, EU's von der Leyen says
Iran must fundamentally change its behavior before any EU sanctions can be lifted, von der Leyen added on Monday.
"The principle of sanctions is that we need real change on the ground before we can think about lifting them. Sanctions are in place to change behavior. So if behavior is changing credibly and verifiably, then you can lift sanctions," she said, speaking at a press conference in Evian, France, ahead of the G7 summit.
Maximum restraint by all sides in the region
The UN's Human Rights Chief Volker Tuerk welcomed the announcement of the peace deal and urged maximum restraint by all sides in the region, Reuters reported.
“I welcome the announcement that the United States and Iran have agreed on a peace deal that provides for an immediate and permanent ceasefire, the reopening of the Strait of Hormuz, and a framework for further negotiations,” said Tuerk.
“At this fragile moment, it is clear all sides need to exercise maximum restraint and work to implement the agreement reached quickly and in good faith,” he added.
Additionally, Indonesia's foreign ministry said on Monday that it welcomed the US-Iran peace agreement as a positive development and also called on all parties to continue exercising restraint and uphold their commitments to de-escalate.
Indonesia also reaffirmed its readiness to support efforts to promote peace, security, and stability in the region, the ministry said.
Israeli ministers react to the news
The Israeli cabinet was in the midst of a meeting when it learned the agreement had been announced, Maariv reported.
Prime Minister Netanyahu and Defense Minister Israel Katz reportedly got up from the meeting to connect with Trump and US Secretary of Defense Pete Hegseth when learning of the deal, the report said.
Many of the cabinet ministers reportedly took a "hardline" approach in their responses to the agreement.
"It is right to respond, and I support the prime minister. Let's capture more of their territory," Minister Gila Gamliel said, referring to Lebanon.
Transportation Minister Miri Regev said, "We are not a protectorate state. We need to stop the ping-pong and break out of this equation."
"Stay strong, Prime Minister, but in the Middle East, you have to be the village madman. Not a balanced response and not a measured response." National Security Minister Itamar Ben-Gvir said, following the news of the US-Iran agreement, presumably referring to the IDF's actions in Lebanon.
Ben-Gvir continued in his statement, "We need a little of Mojtaba's stubbornness. Every shot fired at Israel is a declaration of war against us, and we must respond disproportionately."
Reuters contributed to this report.