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Lily Allen performed at an anti-Trump protest in London tonight
Hundreds amassed in Grosvenor Square, Mayfair, for the march, with many holding placards that read: "No to racism, no to Trump."
Among the faces was Lily who even took to a nearby platform to deliver a protest song in which she slammed the President of the United States.
The singer later posted a picture of her performance on Instagram, writing: "I went and sang a song in Grosvenor Square. It was very peaceful."
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Lily described the protest as 'peaceful' later on social media
It was very peaceful.
"You rock keep the peace," enthused one fan, though there were those who criticised the star's performance, with one mocking: "Apparently Trump has now stepped down as President because of your 'protest'."
Lily's performance came just hours after the Smile hitmaker created an inauguration playlist on Spotify, which included songs such as Rihanna's Russian Roulette and REM's End of the World As We Know It.
Protesters at the event – organised by Stand Up To Racism – blasted the American business for many of his controversial views.
Also challenging his views on climate change, another series of placards read: "Trump: climate disaster".
Hundreds gathered across the British capital to slam the US President
Donald Trump becomes 45th U.S. PRESIDENT
Fri, January 20, 2017
The inauguration of Donald Trump as the 45th President of the United States will mark the commencement of the four-year term of Donald Trump as President and Mike Pence as Vice President. A public ceremony will be held on Friday, January 20, 2017, on the West Front of the United States Capitol Building in Washington, D.C.
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US President Donald Trump points to the stands as he walks with his wife Melania during the Inaugural Parade.
"The effects of a Trump presidency is set to be felt all over the world as racism, sexism, homophobia and bigotry is normalised through the voice of one of the most powerful and visible figures in the world," the organisers wrote on the event's Facebook page.
"Progress on C02 emissions targets [will be] dashed as one of the world's largest emitters refuses to accept there is a problem."
The protest came after a plethora of anti-Trump banners were unveiled around the British capital.