The latter is actually a retired soft porn actress and a glamour model whose films include Nude & Naughty, Petticoat Passions Vol 1 and a music video for The Prodigy`s Smack My Bitch Up.
The faux pas came ahead of a meeting between the US President Donald Trump and the PM in Washington.
A daily guidance and press schedule from the office of the press secretary said: "In the afternoon, the President will partake in a bilateral meeting with United Kingdom Prime Minister, Teresa May" - missing out the "h" in her name, despite spelling it correctly elsewhere.
Theresa May could face an awkward visit with Donald Trump after remarks during his campaign
It continued: "The President participates in a working luncheon with Teresa May, Prime Minister of United Kingdom."
The error was repeated in a later guidance note from the Office of the Vice President, though it elsewhere also spelled her name correctly, before finally being rectified fully in another notice from the same office.
During last summer`s Tory leadership race, former adult star Teresa May had to make clear she was not the frontrunner to be the next prime minister after she started trending on Twitter.
/SkyNews/
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