Actor and activist Mark Ruffalo joined The Weekend Prime's Antonia Hylton to discuss why he was among one of thousands of 'No Kings' protesters marching down Fifth Avenue in Manhattan. "We love each other,

The rallies were among hundreds of "No Kings" protests held throughout the United States, timed to coincide with a military parade celebrating the 250th birthday of the U.S. Army in Washington, D.C. Saturday was also Trump's 79th birthday.

Those millions included an estimated 200,000 people in Los Angeles, 100,000 in Philadelphia, 70,000 in Seattle and over 50,000 in New York.

Even the weather was riled up during Saturday’s “No Kings” march in Manhattan. Yet the steady drizzle couldn’t stop tens of thousands of New Yorkers from processing 15 blocks—from Bryant Park down to Madison Square Park—to protest the Trump administration’s immigration policies.

Follow The Post’s live updates from “No Kings” protests against President Trump in NYC and across the country on Saturday,

In New York City, the biggest "No Kings" demonstration will take place at Bryant Park starting at 2:00 p.m. on Saturday and move down Fifth Avenue to Madison Square Park.

A flagship "No Kings" march and rally are planned in Philadelphia, but no events are scheduled to take place in Washington, D.C., where the military parade will take place on Trump's 79th birthday. Organizers of the protests say they want to take attention away from the parade.

NBC News' Jacob Soboroff reports from Los Angeles City Hall where thousands of protesters have gathered for a 'No Kings' protest against the Trump administration and ahead of the president's Washington D.