Donald Trump has said he will remove tariffs on Scottish whisky following a visit from Britain's King Charles and Queen Camilla.
The US president cited the Scotch industry's relationship with the American bourbon industry and the impact of the royals' visit to the White House this week. Most Scotch producers source their casks from the US.
Mr Trump said that while "people have wanted to do this for a long time" the King and Queen "got me to do something that nobody else was able to do".
The Scottish and UK governments had been lobbying the Republican to end tariffs on the industry, as the US is the single biggest market for Scotland's whisky.
The US is also the biggest market for Irish whiskey, which attracts a 10% tariff, in line with other EU spirits exports.
Scittush First Minister John Swinney previously went to the White House to press the president following discussions during his visit to Scotland last year.
Confirming the news, Mr Trump posted on his Truth Social platform: "In honor of the King and Queen of the United Kingdom, who have just left the White House, soon headed back to their wonderful Country, I will be removing the Tariffs and Restrictions on Whiskey having to do with Scotland's ability to work with the Commonwealth of Kentucky on Whiskey and Bourbon, two very important Industries within Scotland and Kentucky.
"People have wanted to do this for a long time, in that there had been great Inter-Country Trade, especially having to do with the Wooden Barrels used. The King and Queen got me to do something that nobody else was able to do, without hardly even asking!
"A wonderful Honor to have them both in the U.S.A. President DONALD J. TRUMP."
Mr Swinney hailed the decision as "tremendous news for Scotland".
He said: "As First Minister, I have made it my mission to do everything possible to lift US tariffs on our whisky.
"People's jobs were at stake. Millions of pounds were being lost every month from the Scottish economy.
"Yet despite this, and despite months of trade talks, it was obvious to me that the UK Government had done little to raise the issue of Scotch whisky, and the US president was not aware that there was an issue until he came here to Scotland.
"By meeting the president during his visit to Scotland and by going to Washington, to the Oval Office, we made Scotland's case. We worked directly with the Scotch Whisky Association to get Scotland's voice heard.
"And, we used every chance to drive our point home, not least the State Banquet hosted by His Majesty The King in London last September."
Mr Swinney said that "hard work" had "paid off" and expressed his thanks to the president "for listening and acting to lift the tariffs".
He also said that Scotland was "grateful" to the King for the "key role he played in this tremendous success".
"Scotland needs a government that is always on Scotland's side," he added.
"It needs experienced leadership that is focused on delivering and knows how to get things done at the very highest level.
"That is what we offer and today shows how important it is."
Business and trade secretary Peter Kyle said: "This is great news for our Scotch whisky industry, which is worth almost £1 billion [€1.16m] in exports and supports thousands of jobs across the UK.
"I have been advocating for lower tariffs on key exports like whisky to protect vital jobs and iconic British brands while strengthening our relationship with the US."
