Hours after his historic peace mission in Singapore , Donald Trump has fired back at Robert De Niro after the Oscar-winning actor slammed him in a speech at the Tony Awards.
After boasting about his "truly amazing" showdown with North Korean leader Kim Jong Un in a series of tweets oboard Air Force One, the US president wasted no time on his way back to the States to punch back at the Hollywood heavyweight.
He tweeted: "Robert De Niro, a very Low IQ individual, has received too many shots to the head by real boxers in movies.
"I watched him last night and truly believe he may be 'punch-drunk'."
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.” I guess he doesnt…
— Donald J. Trump (@realDonaldTrump) June 12, 2018
De Niro, who won the Academy Award for best actor for his portrayal of boxer Jake LaMotta in the 1980 film Raging Bull, got a standing ovation at Sunday's event with his condemnation of Mr Trump.
Punching his fists in the air, he said: "I'm going to say one thing – f*** Trump!
"It's no longer 'down with Trump', it's 'f*** Trump!'" he told the crowd at New York's Radio City Music Hall honouring the best performances on Broadway.
The CBS television network, which was broadcasting the event live but with a delay of a few seconds, bleeped out De Niro's expletive.
Mr Trump defended himself against De Niro's attack by saying the US economy was booming under his presidency.
He wrote: "I guess (De Niro) doesn't realise 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!"
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De Niro has previously described the president as "blatantly stupid," "totally nuts" and an "idiot".
He also threatened to "punch him in the face" in the run-up to the 2016 election.