Sir Rod Stewart congratulates King Charles for putting 'little ratbag' Trump 'in his place'

King Charles III received some very unexpected praise from British singer Sir Rod Stewart over US President Donald Trump.

During a line-up in the interval of an event celebrating the 50th anniversary of the King’s Trust at the Royal Albert Hall on Monday (11 May), the 81-year-old 'Have You Ever Seen the Rain' star

appeared to congratulate the King for putting 'that little ratbag in his place', in reference to his recent state visit to the US.

During the four-day state visit where Charles and Camilla were hosted by Trump and his wife, Melania, the King addressed Congress and touched on topics such as NATO, support for Ukraine and the 'collapse of critical natural systems'.

Sir Rod Stewart congratulated King Charles III during the 50th anniversary of the King’s Trust on Monday (Aaron Chown - WPA Pool/Getty Images)

Later, in a speech at a state dinner, the King joked to his hosts that 'if it wasn’t for us, you’d be speaking French!'.

"May I say, well done in the Americas. You were superb, absolutely superb, put that little ratbag in his place," Stewart said.

Charles appeared to laugh off Stewart's comment as he appeared to continue, saying: "Exactly, that’s it – it went right over his head, right over his head."

While the King continued the conversation briefly, it is unclear what he replied.

The King joked to Trump that 'if it wasn’t for us, you’d be speaking French!' during his US state visit last month (Aaron Schwartz/Sipa/Bloomberg via Getty Images)

Stewart then turned to Camilla and told her: "I was just congratulating your husband on his wonderful performance in the Americas, so great, so brave, so proud."

TV presenters Anthony McPartlin and Declan Donnelly hosted the evening held at the London concert hall.

A-list attendees included singer Alesha Dixon, Emily in Paris actress Lily Collins, Rita Ora, Anne-Marie, Craig David, Skye Newman and Jools Holland.

They were joined by British actors Benedict Cumberbatch and Sir Idris Elba, and Hollywood icon George Clooney and his lawyer wife Amal.

Sir Rod Stewart slammed Trump as a 'little ratbag' (Andrew Harnik / Staff / Getty Images)

Monday's event was a celebration of young people from across the UK who have been helped by the King’s Trust youth charity since it was founded by Charles in 1976.

The trust says it has helped more than 1.3 million young people across the UK in the past 50 years as part of its commitment to ending youth unemployment and helping more young people create better futures for themselves.

While on stage, Charles thanked all of the staff, mentors and volunteers involved in running the King’s Trust and said he hopes it will go on for 'as long as possible'.

Tyla has reached out to the White House for comment.