As he took to the stage in NY to introduce a performance by Bruce Springsteen, the Oscar winning screen icon began a furious attack on the US President.
De Niro was on stage at the Tonys to introduce Bruce Springsteen, whose spoken-word-into-"My Hometown" performance is a whole other conversation that you should really consider having today.
However, film star De Niro may get the bulk of the questions after his big statement at Sunday night's Tony Awards.
As a result, the 74-year-old's words were censored on U.S. TV. "It's no longer down with Trump, it's f-- Trump!"
While many Tony Awards audience members showed their support for De Niro, some celebs were critical of the remarks on social media.
De Niro, speaking Monday in downtown Toronto where he's launching a major development alongside celebrity chef Nobu Matsuhisa, called Trump's behaviour "a disgrace".
President hits back at Robert De Niro after 'F--k Trump' jab
Trump's attack came after De Niro denounced the president, saying " f**k Trump " at the 72nd Annual Tony Awards . At least these units aren't in charge of leading global diplomatic efforts.
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Golden Globe victor and Emmy Award nominee Robin Wright returns as Claire Underwood, the President of the United States in the series.
President Trump fires back at Robert De Niro after Tony Awards rant
It's unclear if Trump thinks De Niro had a role in Punch-Drunk Love since he used quotes, but, just to clarify, De Niro did not. " Robert De Niro , a very Low IQ individual, has received to [sic] many shots to the head by real boxers in movies".
But unlike the expletive-filled rant that earned him a standing ovation at the Tony Awards less than 24 hours earlier, the Oscar-winning actor instead took a PG approach, apologizing to Canadians for Trump's "idiotic behavior". Give the people what they want...always a crowd pleaser!
Joss Whedon seemed to agree: 'THIS IS HOW YOU TALK ABOUT FASCISTS.
"After De Niro, CBS told us to do something drastic, so here we are", Groban joked.
'Ah, the tolerant Left.
"Larry Kudlow looked like he was drunk yesterday morning on CNN, saying that Trudeau stabbed Trump in the back", De Niro said. Just because he plays tough guys, does not make him one. So all the Socialist, Communist, Leftie supporters...,' Kevin Sorbo also slammed the actor.