US President Donald Trump has paused from his string of tweets hailing the success of his meeting with North Korean leader Kim Jong-un to react to an F-bomb outburst by actor Robert De Niro.
Mr Trump labelled De Niro a “very low IQ individual,” after the Oscar-winning actor launched an expletive-laden attack on the stage of the Tony awards ceremony in New York on Sunday.
Mr Trump said he had watched a clip of the incident and tweeted he believed De Niro “may be punch-drunk” in reference to De Niro’s film roles depicting boxers.
Representatives for De Niro have not immediately returned a request for comment.
De Niro prompted loud applause from the audience of theatre actors, directors and producers at Radio City Music Hall after he twice used the F-bomb against Mr Trump.
The Raging Bull actor’s remarks were bleeped for more than 6 million Americans watching the awards show on CBS at home.
De Niro took the stage to introduce rocker and Tony awards performer Bruce Springsteen. Without any preamble, he said, “I’m gonna say one thing. F*** Trump.”
With the audience shrieking and rising to their feet in applause, De Niro said: “It’s no longer down with Trump. It’s f*** Trump.”
He did not elaborate on his comment.
Mr Trump was on his way to Singapore to meet with Mr Kim as the Broadway awards show was taking place. He delivered his response on his Twitter account while on his way back to the United States.
“Robert De Niro, a very Low IQ individual, has received to many shots to the head by real boxers in movies. I watched him last night and truly believe he may be ‘punch-drunk’,” Trump tweeted.
“I guess he doesn’t realize the economy is the best it’s ever been with employment being at an all time high, and many companies pouring back into our country. Wake up Punchy!” Mr Trump added on Twitter.
De Niro won an Oscar for playing American boxer Jake LaMotta in the 1980 film Raging Bull. He returned to the ring in Grudge Match in 2013 and played a boxing trainer in 2016 movie Hands of Stone.
De Niro, a noted liberal, has been increasingly critical of Mr Trump, a Republican, at smaller show business events in the past year, but none of them had the profile of the Tony awards.