J.K. Rowling sent a warning to Theresa May on Twitter today
Addressing their first meeting on Twitter, the Harry Potter author reminded May that the pressure was on and that all eyes were on her.
"History's watching, Theresa," she wrote on the social networking site, her comment being favourited by more than 4,000 people.
Rowling has been vocal in her dislike of Trump, and even branded him a "bigot" back in November.
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Rowling alerted May that the world was watching ahead of her meeting with President Donald Trump
History's watching, Theresa.
"We stand together. We stick up for the vulnerable. We challenge bigots. We don't let hate speech become normalised. We hold the line," she seethed at the time.
Earlier this week, Rowling branded May "an affluent white woman" as she appeared to take a swipe at the Prime Minister ahead of today's meeting.
"Yes, Trump's about to meet an affluent white woman begging him for a trade deal. He'll be reading 'Feminism is For Everybody' by teatime," she mocked.
Later challenged by a fan who asked: "So because of her race, social standing, and job she cannot represent feminism?" Rowling claimed it would take a different type of woman to alter Trump's thinking.
May will set out a plan to deepen relations between Britain and America
Fantastic Beasts premiere in pictures
Tue, November 15, 2016
A star-studded London premiere of Fantastic Beasts and Where to Find Them in pictures
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Ezra Miller, Eddie Redmayne, J. K. Rowling, Carmen Ejogo and Alison Sudol attend the European premiere of "Fantastic Beasts And Where To Find Them" at Odeon Leicester Square on November 15, 2016 in London, England
Rowling branded May 'an affluent white woman' on Twitter earlier this week
"Affluent white women have 'been there' all his life. How exactly will another one kow-towing to him reform him?" she hit back.
The 51-year-old went on: "I think it's laughable that Theresa May asserts that doing her job = a feminist position."
It's reported that May and Trump will set out a plan to deepen relations between Britain and America today, with May previously stating that together the two countries can "rediscover our confidence" and "lead together again".