President Trump said "great things are going to happen" as he discussed the Iran deal Monday.
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Speaking in a hoarse voice at the G7 alongside French President Emmanuel Macron, Trump discussed the agreement he says was reached between the U.S. and Iran.
WATCH: Trump joins official leaders' greeting at G7 summit in France
"I think a lot of great things are going to happen in the Middle East right now, and very importantly the oil is plummeting down and the stock market is shooting up like a rocket today," Trump said.
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Trump added that he "felt badly that we had to go back on the attack for two nights" and said "hopefully it's going to be a good relationship, and we get along."
READ MORE: Deal is reached to end Iran war and Trump orders stop to U.S. naval blockade
Trump arrived for the summit after celebrating his 80th birthday at a UFC event hosted at the White House on Sunday.
Trump unsure if he'll attend Iran deal signing
Trump said he isn't sure whether he'll attend the signing of the agreement to end the war in Iran on Friday.
"Well, it depends," Trump said during a joint appearance with French President Emmanuel Macron. "I may be involved. I may not."
READ MORE: Israelis angry over U.S.-Iran peace deal lash out at Netanyahu
"JD was coming in for that," Trump said, referring to Vice President JD Vance.
Trump is hailing the Iran deal as promising, but not a guarantee.
"Hopefully we get along," he says. "If we don't, we go back to where we started."
France's Macron tells Trump that European forces are ready to deploy in Strait of Hormuz
The French leader said France could dispatch fighter aircraft as early as Tuesday to fly observation flights over the vital waterway and that France's nuclear powered aircraft carrier, already in the Middle East, could help out quickly, too.
It is part of a pitch that France and other G7 allies are making at their summit in Evian-les-Bains to reopen the strait as soon as possible so energy supplies flow freely again to world markets, in the wake of the tentative U.S.-Iran deal to end the war.
"Within 48 hours, frigates could also be deployed. And within two to three days, the aircraft carrier," Macron said.
Trump said: "I don't think we're gonna need much help" because the strait is "going to be open."
"But I don't think it's a bad idea to have a ship or two up here from a few countries. You'd be a great country to do it," Trump said, addressing Macron.