Documentary director Michael Moore held a massive protest Thursday night outside Trump's New York City International Hotel featuring speeches from public figures including actors Robert De Niro and Mark Ruffalo.

The protest started at 6 p.m. with De Niro poking fun at Trump by reading imagined tweets from the president-elect. It was followed by speeches from Moore, Alec Baldwin, New York Mayor Bill De Blasio, Ruffalo and the Rev. Al Sharpton, and others.

Moore started off saying it is a "very dangerous" time in the United States, calling Trump a "sociopath."

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"With a lot of work on our part, we will stop this man," Moore said. "He will not last four years."

Moore called for "100 days of protest" against Trump as he starts his presidency.

Moore, Ruffalo and Baldwin have been outspoken Trump critics during the election and since his victory.

Moore, who accurately predicted Trump’s win, has been calling for massive organized protests surrounding Trump’s Friday inauguration.

"If your rep is a Democrat, tell him/her you expect them to AGGRESSIVELY fight the Trump agenda — and if they don’t, you will work with others to support a true progressive in the Democratic primary in 2018," Moore urged following Trump's win.

Moore also suggested voters to form their “own rapid response team” to quickly react to Trump and the GOP-led Congress.