Robert De Niro called out Donald Trump for being an “existential threat to our freedoms and security” on Saturday before he joined an estimated nine million people at “No Kings” protests against the president and his administration.

“He must be stopped and he must be stopped now!” stressed the actor, a staunch Trump critic who has thrown his support behind the demonstrations.

“It’s time to say no to kings. It’s time to say no to Donald Trump, we’ve had enough!” he said during a press conference.

De Niro — just over a month after his emotional plea for Americans to resist the president — went on to decry Trump’s “unnecessary” Iran war before describing him as a “corrupt leader enriching himself” and his “Epstein class buddies.”

“No taking health care from our most vulnerable neighbors, no unaffordable groceries, no unaffordable energy, no unaffordable housing and no inflation at it’s highest level since COVID. No government masked thugs shooting down our neighbors in the streets,” he emphasized.

He proceeded to take on “all the fucked up things” Trump has done “without the collusion of Congress and the goons in his administration,” adding that GOP officials are bound to him in fear of losing their jobs.

De Niro was later spotted leading a march alongside Rev. Al Sharpton, New York Attorney General Letitia James, Padma Lakshmi and others protesting against the president in New York City.

In Washington, D.C., and St. Paul, Minnesota, music legends Joan Baez and Bruce Springsteen, respectively, performed for massive crowds as protesters called for a U.S. “regime change” as well as the arrests of Trump and members of his Cabinet.

De Niro, in remarks on Sharpton’s MS NOW program “PoliticsNation,” declared that Trump is a “crazy... damaged person” and will try anything while in power before calling on Americans to not let up in protesting him until the midterms are “resolved for the right reasons.”