Mark Ruffalo, Michael Moore, Alec Baldwin Planning Anti-Trump Rally in NYC Ahead of Inauguration

"We are sending a message to Washington that we will fight, at every step, discrimination and harmful policies, today, tomorrow and every day," Ruffalo said in a statement.

New York Mayor Bill de Blasio, the Rev. Al Sharpton and celebrities including Alec Baldwin, Mark Ruffalo, Michael Moore and Rosie Perez are planning to rally New Yorkers to stand up to President-elect Donald Trump on the eve of his inauguration, organizers said Saturday.

Organizers say they expect thousands of New Yorkers to attend the event, put together by groups including Greenpeace and the liberal activist organization MoveOn, on Trump's home turf.

The demonstration is intended as a kickoff to organizing opposition to Trump's policies and support for cities taking their own approach on immigration, climate change, healthcare, workers' rights and other issues.

"We are sending a message to Washington that we will fight, at every step, discrimination and harmful policies, today, tomorrow and every day," Ruffalo said in a statement. He said participants "are coming together to stand up for one another, as we will do every day, to protect the values we hold dear."

The demonstrations, which will be held outside the Trump-developed Trump International Hotel and Tower, a half-mile from the president-elect's home at Trump Tower, also aims to spotlight actions that cities can take locally, such as working on their own to reduce carbon dioxide emissions.

The Republican president-elect's choice for Environmental Protection Agency administrator, current Oklahoma Attorney General Scott Pruitt, has questioned the science showing that the planet is warming and that man-made emissions of carbon dioxide and other greenhouse gases are to blame.

Moore and de Blasio tweeted that they will be protesting outside Trump International Hotel at 6 p.m. ET.

"I'm rallying... because our next president needs to hear from all NYers before he takes office," said de Blasio in a series of tweets.

I'm rallying at Trump Int’l Hotel at 6PM on Jan. 19 because our next president needs to hear from all NYers before he takes office. Join us. — Bill de Blasio (@NYCMayor) January 16, 2017

On Saturday's Saturday Night Live, Baldwin returned as Trump for the show's cold open, which took aim at Trump's first news conference and his addressing of the unverified reports published by Buzzfeed last week.