Hollywood actor George Clooney has had a pop at Donald Trump for ‘making Juneteenth famous’.

And to rub it in, he’s donated half a million dollars to an equality charity in ‘honour’ of the President.

Trump was going to kick off his re-election campaign in Oklohoma on June 19, the day Juneteenth is commemorated, but he postponed it after a backlash. The date marks the end of slavery in the US.

Clooney said in a statement to People magazine: "Thank you President Trump for 'making Juneteenth famous.' Much like when Bull Connor made 'Civil Rights' famous. 

“My family will be donating 500 thousand dollars to the Equal Justice Initiative in honor of your heroic efforts.”

Connor, an American politician, was infamously against civil rights in the 1960s.

And Clooney’s comments come after Trump said in a Wall Street Journal interview he had ‘done a very good thing’ by making Juneteenth ‘famous’.

The President said: "I did something good: I made Juneteenth very famous. It’s actually an important event, an important time. But nobody had ever heard of it."

Trump’s rally in Oklohoma will now be held this weekend.

Clooney has been vocal about racial inequality in recent weeks following the death of George Floyd.

He wrote an article in the Daily Beast recalling events after Rodney King was beaten by LAPD officers in the 1990s. He also honoured other African Americans who had died as a result of police brutality.

He wrote: “We don’t know when these protests will subside. We hope and pray that no one else will be killed. But we also know that very little will change.

"The anger and the frustration we see playing out once again in our streets is just a reminder of how little we’ve grown as a country from our original sin of slavery."