Who were the first heads of state of the US and the UK respectively to meet in person? And as bonus question: Who were the first President and the first King/Queen to be photographed together?
Woodrow Wilson met George V in 1918. It was photographed. Wilson was the first president to cross the Atlantic in office, and no monarch had done it yet (George VI was the first, in 1939), so that would have to be the first. (The President traveling abroad was still a very new concept in 1918. Roosevelt and Taft both visited the Panama Canal, a US project, and Taft made one very short visit to Ciudad Juarez, right across the border from El Paso. That’s it before Wilson.)
Woodrow Wilson visited King George V in December, 1918. King George VI visited FDR in June, 1939.
I would guess it was FDR and George VIfor both. Teddy Roosevelt was the first to leave the country; Wilson met with the British prime minister at Versailles, but the king wasn’t there.
John Adams famously met King George III. If you are are not restricting it to sitting Presidents.
The future King Edward VII dined at the White House with James Buchanan.
Not met, but George Washington authorised a plot to get the future William IV kidnapped during the Revolutionary War.
For someone who wasn’t there he photographs rather well. 
NB See Lord Feldon’s link above.
Bollocks.
What a detailed, reasoned refutation. Major contribution to the thread. :rolleyes:
In rebuttal to Nelson Pike’s incisive commentary, please see the wiki article on William IV: “Early Life”
Not so. It was when William was serving as an officer in the Royal Navy during the American revolution. You can read the letter here:
Or, if you prefer:
It certainly would have required quite a pair to carry out the plot, yes.
Well, if they have it in GW’s own handwriting then that is that and I owe an apology to Mr. AK84.
Although it just sounded too good for the conspiracy theory crowd to be true , conspiracies do happen, and this episode is a good lesson for it.